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.

A303527 Number of 4Xn 0..1 arrays with every element equal to 0, 1, 3, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Table of values

n a(n)
1 8
2 10
3 39
4 103
5 359
6 1875
7 8676
8 36072
9 166784
10 848681
11 4105851
12 19152575
13 92409752
14 457395652
15 2221962919
16 10661835678
17 51739845297
18 253006224877
19 1229143772638
20 5947176017011
21 28886071524170
22 140636912306075
23 683180817411487

List of values

[8, 10, 39, 103, 359, 1875, 8676, 36072, 166784, 848681, 4105851, 19152575, 92409752, 457395652, 2221962919, 10661835678, 51739845297, 253006224877, 1229143772638, 5947176017011, 28886071524170, 140636912306075, 683180817411487]

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

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