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A240379

Number of nX4 0..3 arrays with no element equal to zero plus the sum of elements to its left or two plus the sum of elements above it or zero plus the sum of the elements diagonally to its northwest, modulo 4.

4, 90, 1494, 17550, 281186, 3502886, 52375114, 672652728, 9771038498, 127878632630, 1824118827422, 24208448126400, 341050301141278, 4570912937279916, 63851040871974536, 861645931638541286

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OFFSET

1,1

COMMENTS

Column 4 of A240381

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

EXAMPLE

Some solutions for n=4

..3..1..1..3....1..3..3..1....3..1..1..3....3..1..1..3....1..3..3..1

..3..0..2..3....1..0..0..0....3..2..2..0....3..0..2..0....1..2..0..0

..1..0..2..1....1..3..3..1....2..0..3..2....2..0..0..0....3..0..0..0