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.

A212269 Number of ways to place k non-attacking kings on an n X n cylindrical chessboard, summed over all k >= 0.

Table of values

n a(n)
1 2
2 5
3 19
4 205
5 3011
6 92875
7 4763459
8 459630701
9 78223965193
10 24270274906085
11 13497818986883771
12 13571363009654254429
13 24562890586806439035377
14 80199120146273882569630015
15 471874707649862024071657639861
16 5005895207027974222377733802848093

List of values

[2, 5, 19, 205, 3011, 92875, 4763459, 459630701, 78223965193, 24270274906085, 13497818986883771, 13571363009654254429, 24562890586806439035377, 80199120146273882569630015, 471874707649862024071657639861, 5005895207027974222377733802848093]

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

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