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%I #8 Apr 22 2021 14:12:53
%S 1,23,1377,1436945,9212529925,474961518391793,200900509921996396385
%N Number of n X n 0..4 arrays with each element equal to the number of its horizontal and vertical neighbors less than itself.
%C Diagonal of A196430.
%e Some solutions for n=3
%e ..0..0..1....0..2..0....1..0..1....0..1..2....0..0..0....2..0..0....1..2..1
%e ..0..0..1....0..4..2....1..0..1....0..1..1....3..2..0....1..0..0....0..4..0
%e ..2..0..2....2..0..0....1..0..1....1..1..0....0..3..1....1..0..0....1..2..1
%Y Cf. A196430.
%K nonn
%O 1,2
%A _R. H. Hardin_ Oct 02 2011
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