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A239593
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 or one plus the sum of the elements diagonally to its northwest or one plus the sum of the elements antidiagonally to its northeast, modulo 4
0
2, 3, 31, 643, 38824, 12509870, 11135057785
OFFSET
1,1
COMMENTS
Diagonal of A239599
EXAMPLE
Some solutions for n=4
..3..2..2..0....3..0..0..0....3..2..2..0....3..2..3..2....3..2..2..0
..2..1..2..2....3..2..3..2....2..1..2..0....2..1..2..2....2..1..2..0
..3..2..2..2....2..1..1..2....3..1..3..0....3..2..0..0....3..2..3..3
..2..3..2..0....3..2..2..0....3..2..2..2....2..1..0..0....2..1..2..3
CROSSREFS
Sequence in context: A274609 A372142 A128030 * A214658 A334489 A217761
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 22 2014
STATUS
approved