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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.

A265231 Number of nX4 arrays of permutations of 4 copies of 0..n-1 with no equal vertical neighbors and new values introduced sequentially from 0.

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%I A265231 #3 Dec 06 2015 06:08:58
%S A265231 1,8,495,184740,164933040,277778385204,785263649477535
%N A265231 Number of nX4 arrays of permutations of 4 copies of 0..n-1 with no equal vertical neighbors and new values introduced sequentially from 0.
%C A265231 Column 4 of A265232.
%e A265231 Some solutions for n=4
%e A265231 ..0..1..1..2....0..0..1..1....0..0..1..0....0..1..0..2....0..0..1..1
%e A265231 ..1..0..0..3....2..2..0..3....2..2..3..3....3..2..3..3....2..3..0..0
%e A265231 ..2..3..3..2....3..3..3..2....1..3..1..2....2..3..0..1....1..2..3..1
%e A265231 ..3..2..0..1....2..0..1..1....3..2..0..1....1..2..1..0....3..3..2..2
%Y A265231 Cf. A265232.
%K A265231 nonn
%O A265231 1,2
%A A265231 _R. H. Hardin_, Dec 06 2015

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