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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.

A188957 Number of nX6 array permutations with each element moved no more than a city block distance of two.

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%I A188957 #6 Jul 22 2025 11:28:57
%S A188957 73,532224,6513224285,47085945014364,359214228037483580
%N A188957 Number of nX6 array permutations with each element moved no more than a city block distance of two.
%C A188957 Column 6 of A188958
%e A188957 Some solutions for 3X6
%e A188957 ..0..1..2..3..9.17....0..1..2..3..5..4....0..1..2..3..4.11....0..1..2..3..5..4
%e A188957 ..6..8.13..4.15..5....6..8..7.14.10.11....6..8..7.10.16..5....6..8..7.14.15.11
%e A188957 ..7.12.14.16.10.11...13.15.12.17..9.16...14.12.13..9.17.15...12.13.16.10..9.17
%K A188957 nonn
%O A188957 1,1
%A A188957 _R. H. Hardin_ Apr 14 2011

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