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.

A232070 Number of (n+1) X (2+1) 0..1 arrays with every element equal to some horizontal, diagonal or antidiagonal neighbor, with top left element zero.

Table of values

n a(n)
1 15
2 87
3 602
4 3985
5 26713
6 178484
7 1193537
8 7979619
9 53352090
10 356709629
11 2384952501
12 15945724308
13 106612681357
14 712809462455
15 4765824578786
16 31864172723641
17 213042987115297
18 1424399583243252
19 9523496644232169

List of values

[15, 87, 602, 3985, 26713, 178484, 1193537, 7979619, 53352090, 356709629, 2384952501, 15945724308, 106612681357, 712809462455, 4765824578786, 31864172723641, 213042987115297, 1424399583243252, 9523496644232169]

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

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