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A207983 Number of n X n 0..2 arrays avoiding the pattern z z+1 z horizontally and z z-1 z vertically.

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%I A207983 #8 Jul 22 2025 21:04:23
%S A207983 3,81,12468,12271227,81269646503,3578849222737632,
%T A207983 1043523305166893694120,2015556742069061275212434339
%N A207983 Number of n X n 0..2 arrays avoiding the pattern z z+1 z horizontally and z z-1 z vertically.
%C A207983 Diagonal of A207989
%e A207983 Some solutions for n=4
%e A207983 ..1..1..1..0....0..2..0..0....2..1..2..2....0..2..0..2....0..2..0..1
%e A207983 ..1..2..2..2....0..1..2..0....2..2..1..2....2..2..0..2....2..0..1..1
%e A207983 ..0..1..2..2....1..0..2..0....0..2..0..2....2..0..1..2....0..2..1..1
%e A207983 ..2..0..0..1....0..2..1..2....0..0..2..1....0..2..1..0....2..0..0..1
%K A207983 nonn
%O A207983 1,1
%A A207983 _R. H. Hardin_ Feb 22 2012

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