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.

A207107 Number of n X 4 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 1 and 1 1 0 vertically.

Table of values

n a(n)
1 9
2 81
3 271
4 643
5 1271
6 2239
7 3641
8 5581
9 8173
10 11541
11 15819
12 21151
13 27691
14 35603
15 45061
16 56249
17 69361
18 84601
19 102183
20 122331
21 145279
22 171271
23 200561
24 233413
25 270101
26 310909
27 356131
28 406071
29 461043
30 521371
31 587389
32 659441
33 737881
34 823073

List of values

[9, 81, 271, 643, 1271, 2239, 3641, 5581, 8173, 11541, 15819, 21151, 27691, 35603, 45061, 56249, 69361, 84601, 102183, 122331, 145279, 171271, 200561, 233413, 270101, 310909, 356131, 406071, 461043, 521371, 587389, 659441, 737881, 823073]

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

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