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A221897 Number of nX5 arrays of occupancy after each element stays put or moves to some horizontal, vertical or antidiagonal neighbor, without move-in move-out straight through or left turns.

%I A221897 #6 Jul 23 2025 02:19:12
%S A221897 28,19408,7235107,2815434576,1093046005330,424750933848720,
%T A221897 164973176599593177,64079516472337724523,24889801648272710871176,
%U A221897 9667694294893797006224411,3755123558818256978843191913
%N A221897 Number of nX5 arrays of occupancy after each element stays put or moves to some horizontal, vertical or antidiagonal neighbor, without move-in move-out straight through or left turns.
%C A221897 Column 5 of A221898
%H A221897 R. H. Hardin, <a href="/A221897/b221897.txt">Table of n, a(n) for n = 1..16</a>
%e A221897 Some solutions for n=3
%e A221897 ..0..3..1..1..1....0..3..2..1..3....0..3..0..1..3....0..3..1..2..1
%e A221897 ..0..2..1..2..0....0..0..0..1..0....0..2..1..1..0....0..2..0..2..1
%e A221897 ..0..1..1..0..2....0..2..1..0..2....0..3..0..0..1....0..0..2..1..0
%K A221897 nonn
%O A221897 1,1
%A A221897 _R. H. Hardin_ Jan 30 2013