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%I #6 Jan 14 2013 22:02:13
%S 0,0,364,2420113,2188482014,2468313810280,2142967506078650,
%T 1939585877435608615,1666732821075006620356,1442175413154162238317806
%N Number of 7Xn arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, with no 2-loops and with no occupancy greater than 2
%C Row 7 of A221388
%e Some solutions for n=3
%e ..0..2..1....0..2..0....0..2..1....0..2..1....0..2..1....0..2..0....0..2..1
%e ..0..2..1....1..2..1....1..2..1....0..2..0....0..2..1....1..2..1....0..2..1
%e ..0..2..1....1..2..0....0..2..0....1..2..0....0..2..1....1..2..1....1..2..1
%e ..1..2..0....1..2..0....1..2..0....1..2..0....0..2..1....0..2..0....0..2..1
%e ..1..2..1....1..2..1....1..2..1....1..2..1....0..2..1....0..2..0....0..2..1
%e ..0..2..1....0..2..1....0..2..1....1..2..0....1..2..0....1..2..1....0..2..1
%e ..0..2..0....0..2..0....0..2..0....1..2..0....1..2..0....1..2..0....0..2..0
%K nonn
%O 1,3
%A _R. H. Hardin_, Jan 14 2013