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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.

A208115 Number of n X 5 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 1 and 0 1 1 vertically.

Table of values

n a(n)
1 15
2 225
3 825
4 3025
5 7315
6 17689
7 34713
8 68121
9 117711
10 203401
11 322465
12 511225
13 761475
14 1134225
15 1611345
16 2289169
17 3133423
18 4289041
19 5697321
20 7568001
21 9807315
22 12709225
23 16131625
24 20475625
25 25534575
26 31843449
27 39111633
28 48038761
29 58227331

List of values

[15, 225, 825, 3025, 7315, 17689, 34713, 68121, 117711, 203401, 322465, 511225, 761475, 1134225, 1611345, 2289169, 3133423, 4289041, 5697321, 7568001, 9807315, 12709225, 16131625, 20475625, 25534575, 31843449, 39111633, 48038761, 58227331]

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

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