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.

A303319 Number of 7Xn 0..1 arrays with every element equal to 0, 1, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Table of values

n a(n)
1 64
2 22
3 53
4 361
5 853
6 3453
7 26184
8 148313
9 618149
10 2955145
11 16591424
12 86249043
13 413146658
14 2059509511
15 10710235991
16 54507337628
17 271445240604
18 1367369372608
19 6965330062810
20 35263933509003
21 177512275506692
22 896493252412109

List of values

[64, 22, 53, 361, 853, 3453, 26184, 148313, 618149, 2955145, 16591424, 86249043, 413146658, 2059509511, 10710235991, 54507337628, 271445240604, 1367369372608, 6965330062810, 35263933509003, 177512275506692, 896493252412109]

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

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