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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 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Diagonal of A252836 LINKS R. H. Hardin, Table of n, a(n) for n = 1..29 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: A222508 A220841 A054766 * A301434 A232192 A249791 Adjacent sequences:  A252827 A252828 A252829 * A252831 A252832 A252833 KEYWORD nonn AUTHOR R. H. Hardin, Dec 22 2014 STATUS approved

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Last modified December 4 09:35 EST 2020. Contains 338923 sequences. (Running on oeis4.)