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 A231936 #8 Jul 23 2025 06:44:09 %S A231936 16,668,8426,152180,2462572,36885538,586971925,9394148948, %T A231936 147360195020,2323912599668,36828163940937,581946068219980, %U A231936 9192142912146333,145366991149880099,2298573739864122981,36336196551594686076 %N A231936 Number of nX3 0..3 arrays with no element less than a strict majority of its horizontal, diagonal and antidiagonal neighbors. %C A231936 Column 3 of A231940 %H A231936 R. H. Hardin, <a href="/A231936/b231936.txt">Table of n, a(n) for n = 1..210</a> %H A231936 R. H. Hardin, <a href="/A231936/a231936.txt">Empirical recurrence of order 65</a> %F A231936 Empirical recurrence of order 65 (see link above) %e A231936 Some solutions for n=3 %e A231936 ..1..1..0....0..1..0....1..2..2....2..1..1....1..2..1....0..0..0....1..2..1 %e A231936 ..1..0..3....3..0..2....3..1..1....1..3..3....1..1..2....2..0..0....0..0..0 %e A231936 ..0..0..0....0..2..0....1..1..1....1..1..3....3..1..1....0..0..2....0..0..1 %K A231936 nonn %O A231936 1,1 %A A231936 _R. H. Hardin_, Nov 15 2013