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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.

A264942 Number of nX4 arrays of permutations of 4 copies of 0..n-1 with no equal horizontal neighbors and new values introduced sequentially from 0.

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%I A264942 #3 Nov 29 2015 06:03:12
%S A264942 0,2,332,184740,196389904,368696849320,1122409297218768,
%T A264942 5194172319787113488,34756519036284839519360
%N A264942 Number of nX4 arrays of permutations of 4 copies of 0..n-1 with no equal horizontal neighbors and new values introduced sequentially from 0.
%C A264942 Column 4 of A264945.
%e A264942 Some solutions for n=4
%e A264942 ..0..1..2..0....0..1..2..0....0..1..2..0....0..1..0..2....0..1..0..2
%e A264942 ..1..2..3..2....1..2..0..3....1..3..0..2....1..2..3..0....1..3..1..0
%e A264942 ..0..1..3..2....3..1..2..3....3..1..3..2....1..2..3..0....3..0..2..1
%e A264942 ..3..1..3..0....2..0..3..1....1..3..2..0....3..1..3..2....3..2..3..2
%Y A264942 Cf. A264945.
%K A264942 nonn
%O A264942 1,2
%A A264942 _R. H. Hardin_, Nov 29 2015

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