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 A266099 #6 Dec 21 2015 08:19:01 %S A266099 16,233,3846,52171,841668,12401485,192212829,2895851074,44366390231, %T A266099 672954998752,10269568494478,156143709545549,2379379735679900, %U A266099 36209116313028044,551475236102985343,8394994559793315602 %N A266099 Number of nX6 integer arrays with each element equal to the number of horizontal and antidiagonal neighbors exactly one smaller than itself. %C A266099 Column 6 of A266101. %H A266099 R. H. Hardin, <a href="/A266099/b266099.txt">Table of n, a(n) for n = 1..210</a> %H A266099 R. H. Hardin, <a href="/A266099/a266099.txt">Empirical recurrence of order 72</a> %F A266099 Empirical recurrence of order 72 (see link above) %e A266099 Some solutions for n=4 %e A266099 ..0..2..1..2..0..0....1..0..0..1..1..0....1..0..0..0..1..2....1..0..2..1..0..1 %e A266099 ..1..0..1..2..0..0....1..2..2..1..0..0....1..1..1..1..1..0....1..1..1..2..1..0 %e A266099 ..0..1..1..1..2..0....1..0..2..0..0..1....2..1..0..1..2..1....0..0..0..2..0..1 %e A266099 ..1..0..2..1..0..0....0..1..2..1..1..0....2..1..1..0..0..1....0..0..1..1..1..0 %Y A266099 Cf. A266101. %K A266099 nonn %O A266099 1,1 %A A266099 _R. H. Hardin_, Dec 21 2015