TITLE: I think I found an error in a OEIS-sequence. What is the proper site to post it?
QUESTION [6 upvotes]: 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.

$1)$ 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)

REPLY [2 votes]: 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.