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A221827 Number of nX5 arrays of occupancy after each element moves to some horizontal, vertical or antidiagonal neighbor, without 2-loops or left turns.

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%I A221827 #5 Jul 23 2025 02:16:30
%S A221827 0,333,40983,4715043,570066685,68489860450,8224749361083,
%T A221827 987885812260577,118641972922938733,14248324215718943851,
%U A221827 1711142647446159966808
%N A221827 Number of nX5 arrays of occupancy after each element moves to some horizontal, vertical or antidiagonal neighbor, without 2-loops or left turns.
%C A221827 Column 5 of A221828
%e A221827 Some solutions for n=3
%e A221827 ..1..1..0..0..0....1..1..0..0..1....0..1..1..1..0....0..2..3..1..1
%e A221827 ..1..2..1..0..1....2..2..1..0..1....1..1..1..2..1....1..0..1..2..0
%e A221827 ..2..2..1..2..1....0..1..3..2..0....1..1..1..2..1....1..1..1..1..0
%K A221827 nonn
%O A221827 1,2
%A A221827 _R. H. Hardin_ Jan 26 2013

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