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Number of n X n 0..3 arrays with no element equal to one plus the sum of elements to its left or one plus the sum of the elements above it or two plus the sum of the elements diagonally to its northwest, modulo 4
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%I #5 Dec 18 2015 18:18:50

%S 2,8,68,1613,94613,15039319,6712505927

%N Number of n X n 0..3 arrays with no element equal to one plus the sum of elements to its left or one plus the sum of the elements above it or two plus the sum of the elements diagonally to its northwest, modulo 4

%C Diagonal of A239849

%e Some solutions for n=4

%e ..0..3..3..0....3..3..0..0....0..0..3..3....0..0..0..3....0..0..3..3

%e ..3..1..3..3....3..2..0..0....3..3..1..2....0..3..3..1....0..3..1..3

%e ..3..3..0..1....0..0..2..0....3..3..0..0....3..1..3..3....3..1..2..0

%e ..0..3..1..2....0..0..2..2....0..0..2..0....3..3..0..1....3..3..1..1

%K nonn

%O 1,1

%A _R. H. Hardin_, Mar 28 2014