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A251462
Number of (n+1)X(3+1) 0..2 arrays with every 2X2 subblock summing to a prime and those sums nondecreasing in every row and column
1
602, 3142, 15719, 62309, 239572, 809934, 2678350, 8222849, 24796090, 71644353, 203613185, 565710173, 1545775344, 4185949130, 11136965910, 29652176113, 77452013880, 203909911308, 525772216775, 1373878022187, 3509862980888
OFFSET
1,1
COMMENTS
Column 3 of A251467
FORMULA
Empirical recurrence of order 61 (see link above)
EXAMPLE
Some solutions for n=4
..1..0..2..1....1..1..2..2....1..0..1..0....2..0..0..1....1..0..2..0
..1..0..1..1....0..0..0..1....1..0..2..2....0..0..2..0....1..0..1..2
..1..0..2..1....2..1..2..2....1..0..1..2....2..0..1..2....0..1..1..1
..0..1..2..0....2..0..2..1....0..2..2..2....0..0..2..2....0..2..1..2
..1..0..2..1....2..1..2..2....0..1..2..1....2..0..1..2....1..0..2..2
CROSSREFS
Sequence in context: A363830 A045941 A268588 * A356893 A281561 A184193
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 02 2014
STATUS
approved