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Gijswijt's sequence ([A090822](https://oeis.org/A090822)) is a slow-growing variant of the Kolakoski sequence ([A000002](https://oeis.org/A000002)) where each term is given by the length of the longes…
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For some inputs, `is_pseudoprime(n, b)` seems to return `0`, even if `n` is a Fermat pseudoprime to base `b`.
Example (OEIS: [A020138](https://oeis.org/A020138)):
```perl
use 5.014;
use Math::…
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As per https://oeis.org/wiki/OEIS_format_for_decimal_representation_of_constants, constants can have small negative, large negative, or large positive offsets. However, in these cases, the `cons` link…
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This is a proposal of an enhancement which is probably relatively easy to implement.
Whenever a draft started by a contributor is proposed, reviewed, or approved by another person, the OEIS softwar…
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Ryan added a citation file in #253 which brought up the question: how should pi-Base be cited?
I put @jamesdabbs and myself as that's how Buzzard cited us in https://arxiv.org/pdf/2112.11598.pdf (t…
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Currently search engines and web archives do not process the website of the OEIS Foundation, [oeisf.org](https://oeisf.org), because [its robots.txt](https://oeisf.org/robots.txt) disallows it. It wou…
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Whenever a user copies a multiline text fragment from an OEIS entry and then pastes it into a text editor, empty lines are added between lines. This might be OK for texts, but this is definitely not O…
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This is a report of a bug which is probably easy to fix.
In the contribution history of a person who has an apostrophe in name, like https://oeis.org/history?user=Lynette%20O%27Brien , the link "ol…
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There is a revision number and time in the JSON format of every sequence:
> "revision": 16,
> "time": "2022-07-05T11:39:34-04:00",
I find this revision only in the JSON (neither in the inte…
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I did not have any datapoints. If anyone happens to know, especially if you can link a video please let me know.