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A252977 Number of n X n nonnegative integer arrays with upper left 0 and lower right its king-move distance away minus 2 and every value increasing by 0 or 1 with every step right, diagonally se or down 1
0, 0, 1, 68, 4657, 432842, 60650883, 13458882036, 4857082197177, 2895119784219358, 2877300288177184239, 4796057029604523514392, 13457301734652492685623300, 63707500883584152928303777296 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

COMMENTS

Diagonal of A252983

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..15

EXAMPLE

Some solutions for n=4

..0..0..0..1....0..0..0..0....0..0..0..1....0..0..0..0....0..0..1..1

..0..0..0..1....0..0..0..1....1..1..1..1....0..0..0..0....0..0..1..1

..0..1..1..1....0..0..1..1....1..1..1..1....0..0..0..0....0..1..1..1

..1..1..1..1....1..1..1..1....1..1..1..1....1..1..1..1....1..1..1..1

CROSSREFS

Sequence in context: A159361 A004298 A223226 * A265243 A331867 A267064

Adjacent sequences: A252974 A252975 A252976 * A252978 A252979 A252980

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 25 2014

STATUS

approved

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Last modified November 28 22:51 EST 2022. Contains 358421 sequences. (Running on oeis4.)