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.

A303238 Number of nX4 0..1 arrays with every element equal to 0, 2, 3, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Table of values

n a(n)
1 1
2 13
3 8
4 10
5 61
6 160
7 458
8 1748
9 6056
10 20975
11 76565
12 277934
13 1007900
14 3682461
15 13473650
16 49327443
17 180826119
18 663368564
19 2434697476
20 8939173919
21 32829758366
22 120594251282
23 443046818432
24 1627867352002
25 5981695596761
26 21981441331135

List of values

[1, 13, 8, 10, 61, 160, 458, 1748, 6056, 20975, 76565, 277934, 1007900, 3682461, 13473650, 49327443, 180826119, 663368564, 2434697476, 8939173919, 32829758366, 120594251282, 443046818432, 1627867352002, 5981695596761, 21981441331135]

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

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