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A221000 Number of nX5 arrays of occupancy after each element stays put or moves to some horizontal or vertical neighbor.

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%I A221000 #5 Jul 23 2025 01:36:58
%S A221000 55,29135,14113081,6758547145,3229188933738,1542208831960569,
%T A221000 736464037749057990,351682265933341657231
%N A221000 Number of nX5 arrays of occupancy after each element stays put or moves to some horizontal or vertical neighbor.
%C A221000 Column 5 of A221001
%e A221000 Some solutions for n=3
%e A221000 ..0..1..0..3..1....0..1..1..0..2....0..1..1..2..0....0..1..3..0..1
%e A221000 ..0..3..0..1..0....0..3..0..0..2....0..4..0..1..0....0..3..0..0..1
%e A221000 ..0..4..0..2..0....0..3..0..2..1....0..1..1..2..2....0..2..0..3..1
%K A221000 nonn
%O A221000 1,1
%A A221000 _R. H. Hardin_ Dec 28 2012

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