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.

A301969 Number of 7Xn 0..1 arrays with every element equal to 0, 1 or 4 horizontally or antidiagonally adjacent elements, with upper left element zero.

Table of values

n a(n)
1 64
2 610
3 632
4 1156
5 2454
6 8705
7 33860
8 120603
9 444357
10 1715911
11 6574776
12 25055403
13 96049774
14 368934080
15 1415983660
16 5435511772
17 20873907896
18 80167521480
19 307889914336
20 1182522157914
21 4541861862000
22 17444676630768
23 67003068862917

List of values

[64, 610, 632, 1156, 2454, 8705, 33860, 120603, 444357, 1715911, 6574776, 25055403, 96049774, 368934080, 1415983660, 5435511772, 20873907896, 80167521480, 307889914336, 1182522157914, 4541861862000, 17444676630768, 67003068862917]

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

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