cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A251861 Number of non-palindromic words (length n>0) over the alphabet of 26 letters.

Table of values

n a(n)
1 0
2 650
3 16900
4 456300
5 11863800
6 308898200
7 8031353200
8 208826607600
9 5429491797600
10 141167083772000
11 3670344178072000
12 95428956352766400
13 2481152865171926400
14 64509974695265340800
15 1677259342076898860800
16 43608742899220046995200
17 1133827315379721221875200
18 29479510200008489360729600
19 766467265200220723378969600
20 19928148895209267985244544000

List of values

[0, 650, 16900, 456300, 11863800, 308898200, 8031353200, 208826607600, 5429491797600, 141167083772000, 3670344178072000, 95428956352766400, 2481152865171926400, 64509974695265340800, 1677259342076898860800, 43608742899220046995200, 1133827315379721221875200, 29479510200008489360729600, 766467265200220723378969600, 19928148895209267985244544000]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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