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.

A302674 Number of n X n 0..1 arrays with every element equal to 0, 1, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Table of values

n a(n)
1 1
2 3
3 8
4 20
5 63
6 453
7 6311
8 92889
9 1847358
10 65801890
11 3339677315
12 218906752065
13 21593578996507
14 3271858745091063
15 693762002728416501
16 208397398216895893003
17 93110263365139995537485

List of values

[1, 3, 8, 20, 63, 453, 6311, 92889, 1847358, 65801890, 3339677315, 218906752065, 21593578996507, 3271858745091063, 693762002728416501, 208397398216895893003, 93110263365139995537485]

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

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