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.

A268882 Number of n X 4 binary arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling two exactly once.

Table of values

n a(n)
1 5
2 54
3 501
4 4133
5 31956
6 236960
7 1706732
8 12034000
9 83485488
10 571836176
11 3876692480
12 26059576704
13 173934499008
14 1153927868416
15 7615733792000
16 50035609197824
17 327432063642624
18 2135189929320448
19 13880060602788864

List of values

[5, 54, 501, 4133, 31956, 236960, 1706732, 12034000, 83485488, 571836176, 3876692480, 26059576704, 173934499008, 1153927868416, 7615733792000, 50035609197824, 327432063642624, 2135189929320448, 13880060602788864]

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

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