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%I #5 Jun 26 2022 02:44:24
%S 0,441,21660,4096576,438377904,56606878084,6757282699788,
%T 830820670081600,100904384322992160
%N Number of 4 X n arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor.
%C Row 4 of A221245.
%e Some solutions for n=3
%e ..0..1..0....0..3..0....0..0..1....0..0..0....0..3..0....2..1..0....0..1..0
%e ..1..1..1....0..2..1....1..4..0....2..6..0....0..2..1....0..5..0....2..3..1
%e ..0..5..0....1..0..1....1..4..0....1..2..0....1..1..0....0..1..0....1..1..0
%e ..1..1..1....0..3..1....0..0..1....1..0..0....2..2..0....0..1..2....0..3..0
%Y Cf. A221245.
%K nonn
%O 1,2
%A _R. H. Hardin_, Jan 06 2013