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 A266106 #4 Dec 21 2015 08:24:21 %S A266106 1,272,3928,26948,457738,12401485,240721036,3915407831,72703138725, %T A266106 1459414293797,27836081746405,518910020345998,9822723169066292, %U A266106 186833710020397058,3546385987603510610,67356747007063872600 %N A266106 Number of 6Xn integer arrays with each element equal to the number of horizontal and antidiagonal neighbors exactly one smaller than itself. %C A266106 Row 6 of A266101. %H A266106 R. H. Hardin, <a href="/A266106/b266106.txt">Table of n, a(n) for n = 1..210</a> %e A266106 Some solutions for n=4 %e A266106 ..0..0..1..2....0..2..1..2....1..0..2..1....1..0..2..1....1..0..0..1 %e A266106 ..0..2..1..1....1..0..1..1....1..1..0..1....1..1..0..0....0..2..1..1 %e A266106 ..0..0..0..0....0..2..0..1....2..1..2..0....2..1..2..0....1..0..0..0 %e A266106 ..0..0..0..0....1..0..2..1....1..0..0..1....2..1..0..0....0..0..2..1 %e A266106 ..1..2..0..0....0..0..0..1....0..0..1..1....2..1..2..1....1..1..0..1 %e A266106 ..1..0..0..1....1..1..1..0....1..1..0..0....1..0..0..0....2..1..2..0 %Y A266106 Cf. A266101. %K A266106 nonn %O A266106 1,2 %A A266106 _R. H. Hardin_, Dec 21 2015