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.

A301605 Number of nX5 0..1 arrays with every element equal to 0, 2 or 3 horizontally or vertically adjacent elements, with upper left element zero.

Table of values

n a(n)
1 1
2 6
3 13
4 65
5 330
6 1297
7 6393
8 30904
9 154041
10 764894
11 3804884
12 18978589
13 94697319
14 472770928
15 2360757090
16 11789229577
17 58877258002
18 294049444613
19 1468594070621
20 7334774136424
21 36633069686965
22 182962072923069
23 913796219872826

List of values

[1, 6, 13, 65, 330, 1297, 6393, 30904, 154041, 764894, 3804884, 18978589, 94697319, 472770928, 2360757090, 11789229577, 58877258002, 294049444613, 1468594070621, 7334774136424, 36633069686965, 182962072923069, 913796219872826]

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

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