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.

A285153 Number of 2 X n 0..1 arrays with the number of 1's horizontally or antidiagonally adjacent to some 0 one less than the number of 0's adjacent to some 1.

Table of values

n a(n)
1 0
2 2
3 14
4 58
5 210
6 788
7 2960
8 11168
9 42402
10 161856
11 619864
12 2381342
13 9174202
14 35432030
15 137146164
16 531899380
17 2066518438
18 8041414956
19 31335774120
20 122265661844
21 477610788400
22 1867692035114
23 7310704019360
24 28641893196882

List of values

[0, 2, 14, 58, 210, 788, 2960, 11168, 42402, 161856, 619864, 2381342, 9174202, 35432030, 137146164, 531899380, 2066518438, 8041414956, 31335774120, 122265661844, 477610788400, 1867692035114, 7310704019360, 28641893196882]

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

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