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.

A240516 Number of n X 5 0..1 arrays with no element equal to exactly two horizontal and vertical neighbors, with new values 0..1 introduced in row major order.

Table of values

n a(n)
1 8
2 21
3 73
4 326
5 1376
6 6205
7 28942
8 135093
9 636475
10 3024792
11 14429369
12 69010353
13 330906118
14 1589431389
15 7642628408
16 36779710534
17 177110221193
18 853219818189
19 4111568990816
20 19817506062480
21 95533854083563
22 460587995304966

List of values

[8, 21, 73, 326, 1376, 6205, 28942, 135093, 636475, 3024792, 14429369, 69010353, 330906118, 1589431389, 7642628408, 36779710534, 177110221193, 853219818189, 4111568990816, 19817506062480, 95533854083563, 460587995304966]

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

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