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A252830
Number of n X n nonnegative integer arrays with upper left 0 and every value within 2 of its king move distance from the upper left and every value increasing by 0 or 1 with every step right, diagonally se or down
1
1, 5, 44, 493, 6068, 78674, 1056756, 14564701, 204666202, 2919462498, 42143180174, 614251526864, 9024782449736, 133489812361806, 1985873221687284, 29689739907869581, 445797648515664064, 6719243690952576928
OFFSET
1,2
COMMENTS
Diagonal of A252836
LINKS
EXAMPLE
Some solutions for n=4
..0..0..1..2....0..0..1..1....0..0..1..1....0..0..1..1....0..0..0..1
..1..1..1..2....1..1..1..1....1..1..1..2....1..1..1..1....1..1..1..1
..1..1..2..2....1..1..1..1....1..1..1..2....1..2..2..2....1..1..1..1
..2..2..2..2....2..2..2..2....1..2..2..2....1..2..2..3....2..2..2..2
CROSSREFS
Sequence in context: A343425 A054766 A369216 * A301434 A232192 A249791
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 22 2014
STATUS
approved