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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.

A188952 Number of n X n array permutations with each element moved no more than a city block distance of two.

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%I A188952 #8 Jul 22 2025 11:28:24
%S A188952 1,24,29172,504690017,229188213745576
%N A188952 Number of n X n array permutations with each element moved no more than a city block distance of two.
%C A188952 Diagonal of A188958
%e A188952 Some solutions for 3X3
%e A188952 ..3..0..4....3..0..2....4..7..8....0..2..1....0..1..8....4..0..8....2..7..0
%e A188952 ..1..2..7....1..8..4....0..1..3....7..3..8....7..2..5....7..2..3....3..1..4
%e A188952 ..6..8..5....6..7..5....6..5..2....6..5..4....3..4..6....6..1..5....6..5..8
%K A188952 nonn
%O A188952 1,2
%A A188952 _R. H. Hardin_ Apr 14 2011

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