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.
%I A231861 #6 Jun 02 2025 08:48:55 %S A231861 729,121393,83630516,42745416641,24762957054535,14071005227913420, %T A231861 8071247819035667716,4623688984630307777029,2650518736546491335942949, %U A231861 1519287155417179539434532388,870900295165528458057167384178 %N A231861 Number of 7Xn 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). %C A231861 Row 7 of A231855 %H A231861 R. H. Hardin, <a href="/A231861/b231861.txt">Table of n, a(n) for n = 1..30</a> %e A231861 Some solutions for n=2 %e A231861 ..0..2....0..0....0..2....0..0....0..0....0..0....0..0....0..0....0..2....0..2 %e A231861 ..2..0....0..1....2..0....1..1....1..0....1..0....0..2....2..2....2..0....2..0 %e A231861 ..0..0....1..1....1..0....2..0....2..2....0..1....2..2....1..1....1..2....1..1 %e A231861 ..0..1....1..1....0..1....2..2....1..0....0..0....2..2....1..2....2..2....2..1 %e A231861 ..1..1....1..1....0..0....2..1....2..2....0..0....0..1....0..1....0..1....1..2 %e A231861 ..2..0....2..0....1..1....0..0....2..2....1..1....1..0....2..0....2..2....0..1 %e A231861 ..2..2....0..1....2..0....0..1....0..0....2..0....0..1....0..0....0..1....1..1 %K A231861 nonn %O A231861 1,1 %A A231861 _R. H. Hardin_, Nov 14 2013