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.

A303451 Number of nX3 0..1 arrays with every element equal to 0, 1, 2, 3, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Table of values

n a(n)
1 4
2 32
3 232
4 1696
5 12408
6 90800
7 664512
8 4863312
9 35593024
10 260494592
11 1906482784
12 13952986432
13 102117809280
14 747370269248
15 5469783650304
16 40031741270784
17 292980566109568
18 2144238781851392
19 15693054372112384
20 114852859493121280

List of values

[4, 32, 232, 1696, 12408, 90800, 664512, 4863312, 35593024, 260494592, 1906482784, 13952986432, 102117809280, 747370269248, 5469783650304, 40031741270784, 292980566109568, 2144238781851392, 15693054372112384, 114852859493121280]

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

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