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.

A269005 Number of n X n binary arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling two exactly once.

Table of values

n a(n)
1 0
2 4
3 46
4 2136
5 109058
6 14382480
7 3258530608
8 1582785864320
9 1554970236400402
10 3055129067325800608
11 12891237725516640144940
12 106775629834644247372248448
13 1932363567303596958505554161216
14 68821810412730939070416537380998580

List of values

[0, 4, 46, 2136, 109058, 14382480, 3258530608, 1582785864320, 1554970236400402, 3055129067325800608, 12891237725516640144940, 106775629834644247372248448, 1932363567303596958505554161216, 68821810412730939070416537380998580]

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

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