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A251365
Number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock summing to 1 2 3 4 5 6 or 7
1
79, 17969, 35257505, 597108952883, 87274898497023663, 110094177769643072247073, 1198610045118318903896947691841, 112623783277770500761933316031229772803
OFFSET
1,1
COMMENTS
Diagonal of A251373
LINKS
EXAMPLE
Some solutions for n=2
..2..0..0....1..1..0....0..0..1....0..1..1....0..1..0....1..2..1....2..0..1
..0..1..2....2..0..2....0..2..2....2..1..1....0..1..0....2..1..1....2..2..1
..0..0..1....1..2..1....1..1..2....2..2..0....2..1..1....1..1..2....1..2..2
CROSSREFS
Sequence in context: A265446 A145317 A363515 * A023343 A265465 A138917
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 01 2014
STATUS
approved