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.

A268890 Number of 5Xn binary arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling two exactly once.

Table of values

n a(n)
1 0
2 235
3 2418
4 31956
5 317966
6 3283890
7 31427480
8 299524050
9 2777161184
10 25505113994
11 231143340184
12 2077724593805
13 18526267129268
14 164165431218906
15 1446558738555296
16 12686251671077220
17 110791183092125102

List of values

[0, 235, 2418, 31956, 317966, 3283890, 31427480, 299524050, 2777161184, 25505113994, 231143340184, 2077724593805, 18526267129268, 164165431218906, 1446558738555296, 12686251671077220, 110791183092125102]

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

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