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.

A303202 Number of 7Xn 0..1 arrays with every element equal to 0, 1, 3, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Table of values

n a(n)
1 64
2 86
3 305
4 1357
5 5573
6 32223
7 164295
8 791150
9 3806973
10 20061588
11 102569116
12 509264634
13 2533233396
14 13009655163
15 66295486978
16 333341116143
17 1676598847494
18 8537179144591
19 43394714360416
20 219303340502779
21 1108007577865676

List of values

[64, 86, 305, 1357, 5573, 32223, 164295, 791150, 3806973, 20061588, 102569116, 509264634, 2533233396, 13009655163, 66295486978, 333341116143, 1676598847494, 8537179144591, 43394714360416, 219303340502779, 1108007577865676]

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

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