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.

A302736 Number of nX3 0..1 arrays with every element equal to 0, 1, 2, 3 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Table of values

n a(n)
1 4
2 32
3 228
4 1652
5 11980
6 86916
7 630604
8 4575332
9 33196332
10 240856196
11 1747533964
12 12679246500
13 91994373868
14 667465912772
15 4842804251724
16 35137004861924
17 254936818941100
18 1849696122577668
19 13420484966010892
20 97372435679847716

List of values

[4, 32, 228, 1652, 11980, 86916, 630604, 4575332, 33196332, 240856196, 1747533964, 12679246500, 91994373868, 667465912772, 4842804251724, 35137004861924, 254936818941100, 1849696122577668, 13420484966010892, 97372435679847716]

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

Content is available under The OEIS End-User License Agreement.