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.

A231856 Number of 2 X n 0..2 arrays with no element having a strict majority of its horizontal and antidiagonal neighbors equal to itself plus one mod 3, with upper left element zero (rock paper and scissors drawn positions).

Table of values

n a(n)
1 3
2 8
3 34
4 144
5 612
6 2613
7 11159
8 47675
9 203696
10 870316
11 3718550
12 15888022
13 67883780
14 290042861
15 1239248291
16 5294859950
17 22623022401
18 96659996189
19 412993219856
20 1764570725956
21 7539372796546
22 32213014377497
23 137634565007885

List of values

[3, 8, 34, 144, 612, 2613, 11159, 47675, 203696, 870316, 3718550, 15888022, 67883780, 290042861, 1239248291, 5294859950, 22623022401, 96659996189, 412993219856, 1764570725956, 7539372796546, 32213014377497, 137634565007885]