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A188955 Number of nX4 array permutations with each element moved no more than a city block distance of two.

%I A188955 #7 Jul 22 2025 11:28:44
%S A188955 14,3969,1722256,504690017,151700751624,47085945014364,
%T A188955 14529766291673016,4473345039125385924,1378237965469881319638,
%U A188955 424709806495811992908136,130865875276447905156349870,40323080903656724639859869876
%N A188955 Number of nX4 array permutations with each element moved no more than a city block distance of two.
%C A188955 Column 4 of A188958
%H A188955 R. H. Hardin, <a href="/A188955/b188955.txt">Table of n, a(n) for n = 1..52</a>
%e A188955 Some solutions for 3X4
%e A188955 ..0..2..5..7....0..2..1..3....0..4..1..2....0..2..3..1....0..2..3..1
%e A188955 ..6..1..9.11....8..4.10..5....6..8..7..3....8..6.11..5....4.10..9..5
%e A188955 .10..4..8..3....9..6.11..7...10.11..5..9...10..4..7..9....8.11..7..6
%K A188955 nonn
%O A188955 1,1
%A A188955 _R. H. Hardin_ Apr 14 2011