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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.

A267723 Number of nX6 arrays of permutations of 6 copies of 0..n-1 with every element equal to at least one horizontal neighbor and the top left element equal to 0.

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%I A267723 #3 Jan 20 2016 06:43:39
%S A267723 1,12,588,93672,33807456,22933860480,26118842636160,46232213032938240
%N A267723 Number of nX6 arrays of permutations of 6 copies of 0..n-1 with every element equal to at least one horizontal neighbor and the top left element equal to 0.
%C A267723 Column 6 of A267724.
%e A267723 Some solutions for n=4
%e A267723 ..0..0..0..0..2..2....0..0..3..3..0..0....0..0..1..1..0..0....0..0..2..2..2..2
%e A267723 ..3..3..1..1..1..1....1..1..3..3..2..2....2..2..2..2..3..3....3..3..1..1..1..1
%e A267723 ..2..2..0..0..3..3....2..2..2..2..3..3....3..3..1..1..1..1....0..0..1..1..0..0
%e A267723 ..2..2..3..3..1..1....1..1..1..1..0..0....0..0..3..3..2..2....3..3..3..3..2..2
%Y A267723 Cf. A267724.
%K A267723 nonn
%O A267723 1,2
%A A267723 _R. H. Hardin_, Jan 20 2016

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