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.

A303326 Number of 4 X n 0..1 arrays with every element equal to 0, 2, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Table of values

n a(n)
1 8
2 2
3 8
4 2
5 12
6 10
7 46
8 50
9 204
10 290
11 1034
12 1682
13 5458
14 9802
15 29582
16 57122
17 163166
18 332930
19 911976
20 1940450
21 5149146
22 11309770
23 29300080
24 65918162
25 167721900
26 384199202
27 964447184
28 2239277042
29 5564863708
30 13051463050
31 32192084054

List of values

[8, 2, 8, 2, 12, 10, 46, 50, 204, 290, 1034, 1682, 5458, 9802, 29582, 57122, 163166, 332930, 911976, 1940450, 5149146, 11309770, 29300080, 65918162, 167721900, 384199202, 964447184, 2239277042, 5564863708, 13051463050, 32192084054]

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

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