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A239332 Number of n X n 0..3 arrays with no element equal to one plus the sum of elements to its left or three plus the sum of the elements above it, modulo 4.

%I A239332 #7 Jun 02 2025 09:25:57
%S A239332 2,31,2187,790681,1527488498,15397080750829,808844678734652790,
%T A239332 222534953338562308679099,320707048341323698139814420023
%N A239332 Number of n X n 0..3 arrays with no element equal to one plus the sum of elements to its left or three plus the sum of the elements above it, modulo 4.
%C A239332 Diagonal of A239340
%e A239332 Some solutions for n=3
%e A239332 ..0..2..0....2..0..1....2..2..2....2..0..0....0..2..0....0..2..0....2..1..1
%e A239332 ..2..0..0....0..0..2....2..2..0....2..0..2....0..2..0....0..2..0....2..2..2
%e A239332 ..2..0..2....2..0..1....0..2..2....0..2..0....0..0..2....0..0..0....0..3..1
%K A239332 nonn
%O A239332 1,1
%A A239332 _R. H. Hardin_, Mar 16 2014