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OeisWiki:Community Portal

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This page contains notes about the status of the OEIS wiki. It provides a brief description of the wiki setup. It will also be used to announce changes in the structure of the wiki, so it may be useful to add it to your watchlist by clicking on the watch tab at the top of the page.

Users can create and modify discussion pages here. The discussion pages are a reasonable place to make comments about the structure of the wiki.

Do not use the discussion pages to suggest changes to OEIS sequence entries.

An account is necessary to contribute to the Wiki. To request an account, click here. There was a time when the username was required to be your Real Name. This is no longer required, but is strongly recommended. If this evolving statement causes you to want to change your username, send email to David, and I can make the change.

A few preliminary pages (most of these need to be updated!)


Sequence of the Day for July 22

A038770 Numbers divisible by at least one of their base 10 digits.

{ ..., 20, 21, 22, 24, 25, 26, 28, ... }

I choose to start the listing at 20 because 1-digit numbers are trivially members of this sequence, while 2-digit numbers with a 1 among their digits are also trivially in this sequence. The choice of base 10 here encourages multiples of 5 but discourages odd multiples of 3 or 7. Regardless of the base, most prime numbers are excluded if in that base they are more than one digit and none of their digits in that base are 1.

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