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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.

A188956 Number of nX5 array permutations with each element moved no more than a city block distance of two.

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%I A188956 #6 Jul 22 2025 11:28:50
%S A188956 31,45288,104735558,151700751624,229188213745576,359214228037483580
%N A188956 Number of nX5 array permutations with each element moved no more than a city block distance of two.
%C A188956 Column 5 of A188958
%e A188956 Some solutions for 3X5
%e A188956 ..0..1..2..8..3....0..1..2..8..3....0..1..2..7..9....0..1..2..7..3
%e A188956 ..5.10..7..9.13....6..7..5.13..4....6.10..5..4.14....6.10..9.14..4
%e A188956 .11..6.14.12..4...10.11.14.12..9...11.13.12..3..8...11..5.13.12..8
%K A188956 nonn
%O A188956 1,1
%A A188956 _R. H. Hardin_ Apr 14 2011

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