Intereting Posts

Prove that $\sum_{n=0}^\infty \frac{(-1)^n}{3n+1} = \frac{\pi}{3\sqrt{3}}+\frac{\log 2}{3}$
A Nim game variant
Arithmetic series relationship with difference of two consecutive cubes. Is this a thing?
Evaluating $\int_0^\pi \frac{x}{(\sin x)^{\sin (\cos x)}}dx$
Which number fields can appear as subfields of a finite-dimensional division algebra over Q with center Q?
What's the asymptotic lower bound of the sum $\frac 3 2 + \sum_{k=3}^{n} \frac{n!}{k(n-k)!n^k}$?
For the Fibonacci numbers, show for all $n$: $F_1^2+F_2^2+\dots+F_n^2=F_nF_{n+1}$
Intersection of neighborhoods of 0. Subgroup?
Prove: $f: \mathbb{R} \rightarrow \mathbb{R}$ st for every $x \in \mathbb{R}$ there exists $n$ st $f^{(n)}(x) = 0$, f is a polynomial.
Rank product of matrix compared to individual matrices.
Intuition of why $\gcd(a,b) = \gcd(b, a \pmod b)$?
Two questions about Euler's number $e$
Question on using sandwich rule with trig and abs function to show that a limit exists.
Does the following inequality hold if and only if $N$ is an odd deficient number?
What is the rank of the matrix consisting of all permutations of one vector?

I checked the link given to this OEIS-sequence :

https://oeis.org/A081121

and apparantly the numbers $3136$ and $6789$ appear in the sequence. However, we have $$4192^2=260^3-3136$$ and $$94^2=25^3-6789$$ so the two numbers should not appear in the sequence.

- Elementary solution to the Mordell equation $y^2=x^3+9$?
- How to find all rational points on the elliptic curves like $y^2=x^3-2$
- $x^3-9=y^2$ find integral solutions
- Is there an explanation for these gaps?
- Solutions to $y^2 = x^3 + k$?
- Integral solutions to $56u^2 + 12 u + 1 = w^3$

$1)$ Did I miss something, or is this actually an error ?

$2)$ What is the proper site to post such errors ?

$3)$ How can such errors happen, if the sequence is generated by a computer program and pasted ? (I am pretty sure that the sequences are produced this way)

- Show that there are infinitely many powers of two starting with the digit 7
- Asymptotics of the lower approximation of a pair of natural numbers by a coprime pair
- What is the Pontryagin dual of the rationals?
- Is there an explicit embedding from the various fields of p-adic numbers $\mathbb{Q}_p$ into $\mathbb{C}$?
- Theorem on natural density
- When is $(p - 1)! + 1$ a power of $p$?
- Is an integer uniquely determined by its multiplicative order mod every prime
- Same number of partitions of a certain type?
- Find the value of $a^2-b^2+c^2$
- How many ways can $133$ be written as sum of only $1s$ and $2s$

The proper site to post the corrections is in fact OEIS. Anyone can submit edits, but unlike Wikipedia they are reviewed before they go through. If the reviewers agree with you they will post your edits. You can add a summary on the bottom explaining your edit.

These sequences are not necessarily generated by a computer program, and even if they are the output of the program may be entered by hand. This is true for some sequences I have contributed to.

1) These appear to actually be errors.

2) You can post this on the OEIS if you make an account, and mention that the b-file has an incorrect term.

3) In the OEIS article, it appears that the terms were uploaded from a paper

https://link.springer.com/article/10.1023/A:1000281602647

if there were no typos transferring the results, the methods in the paper may have produced an incorrect result, (I can’t verify this due to a pay wall). If that were the case, it might be worth contacting the author.

- A continued fraction involving prime numbers
- A question with infinity
- Compute the following sum $ \sum_{i=0}^{n} \binom{n}{i}(i+1)^{i-1}(n – i + 1) ^ {n – i – 1}$?
- If n balls are thrown into k bins, what is the probability that every bin gets at least one ball?
- Euler's totient function of 18 – phi(18)
- Structure of $Gal(\mathbb{Q}(\zeta_{15})/\mathbb{Q})$?
- Is this quotient ring $\mathbb{C}/\ker\phi$ integrally closed?
- How to prove $\left(|a+b|^p+|a-b|^p\right)^{1/p}\ge 2^{1/p}\left(a^2+(p-1)b^2\right)^{1/2}$
- Cayley-Hamilton Theorem – Trace of Exterior Power Form
- The continuity of the expectation of a continuous stochastic procees
- Representation theorem for local martingales
- Splitting of conjugacy class of an element
- composition of two uniformly continuous functions.
- $j^2 = 1$, but $j \neq \pm 1$; what is $j$?
- Divergence of $\sum\limits_{n=1}^{\infty} \frac{\cos(\log(n))}{n}$