%I #5 Dec 18 2015 18:18:49
%S 2,31,2187,790681,1527488498,15397080750829,808844678734652790,
%T 222534953338562308679099,320707048341323698139814420023
%N 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 Diagonal of A239340
%e Some solutions for n=3
%e ..0..2..0....2..0..1....2..2..2....2..0..0....0..2..0....0..2..0....2..1..1
%e ..2..0..0....0..0..2....2..2..0....2..0..2....0..2..0....0..2..0....2..2..2
%e ..2..0..2....2..0..1....0..2..2....0..2..0....0..0..2....0..0..0....0..3..1
%K nonn
%O 1,1
%A _R. H. Hardin_, Mar 16 2014
