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A239652
Number of 4Xn 0..3 arrays with no element equal to zero plus the sum of elements to its left or two plus the sum of the elements above it, modulo 4
1
22, 560, 13476, 320314, 7629186, 181039448, 4304123072, 102200616210, 2428626527384, 57685354968172, 1370565397733518, 32557886444429002, 773502177670875660, 18375412388378425556, 436547133372227822360
OFFSET
1,1
COMMENTS
Row 4 of A239649
FORMULA
Empirical recurrence of order 91 (see link above)
EXAMPLE
Some solutions for n=3
..1..0..0....3..0..1....1..0..0....1..3..3....3..1..3....1..0..0....1..0..0
..1..3..1....2..3..0....1..0..0....1..2..0....3..1..2....1..0..3....2..0..3
..2..0..1....2..3..0....3..0..1....2..1..0....2..1..1....1..0..0....3..1..3
..1..0..3....3..1..1....1..0..0....1..2..0....3..2..3....3..1..3....2..1..1
CROSSREFS
Sequence in context: A203456 A271266 A333899 * A223883 A223890 A240369
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 23 2014
STATUS
approved