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%I #5 Dec 18 2015 18:18:50
%S 2,23,1480,510748,884977259,8243207656791,399696014140196630,
%T 102140919909434198721245,136329092264192919129397551406
%N Number of n X n 0..3 arrays with no element equal to zero plus the sum of elements to its left or one plus the sum of the elements above it, modulo 4
%C Diagonal of A239819
%e Some solutions for n=3
%e ..3..2..2....3..2..0....3..0..0....3..2..2....2..3..3....3..2..0....2..3..3
%e ..3..0..1....2..1..0....1..0..2....3..2..2....2..1..1....2..0..0....2..3..3
%e ..2..0..1....3..1..3....2..0..1....1..2..0....2..3..2....1..2..2....3..2..0
%K nonn
%O 1,1
%A _R. H. Hardin_, Mar 27 2014