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.

A215943 Number of ways to place k non-attacking bishops on an n x n toroidal chessboard, summed over all k >= 0.

Table of values

n a(n)
1 2
2 9
3 34
4 289
5 1546
6 19321
7 130922
8 2169729
9 17572114
10 364466281
11 3405357682
12 85143154849
13 896324308634
14 26309790300249
15 306827170866106
16 10366719612433921
17 132240988644215842
18 5064730099043043529
19 69974827707903049154
20 3000912883089564050721

List of values

[2, 9, 34, 289, 1546, 19321, 130922, 2169729, 17572114, 364466281, 3405357682, 85143154849, 896324308634, 26309790300249, 306827170866106, 10366719612433921, 132240988644215842, 5064730099043043529, 69974827707903049154, 3000912883089564050721]

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

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