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A253005 Number of n X n nonnegative integer arrays with upper left 0 and lower right its king-move distance away minus 3 and every value increasing by 0 or 1 with every step right, diagonally se or down. 0
0, 0, 0, 1, 250, 54219, 14697256, 5713126349, 3406380649146, 3235013673306411, 5006915703789559516, 12814921349279258614386, 54759970343589573849950696, 393147238947490609962950665584, 4762079888047633609309896734274288 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,5

COMMENTS

Diagonal of A253011.

LINKS

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

EXAMPLE

Some solutions for n=6:

..0..0..0..0..0..0....0..0..0..0..0..0....0..1..1..1..1..2....0..0..1..1..1..2

..0..0..0..0..0..1....0..0..0..1..1..1....1..1..1..1..1..2....0..0..1..1..1..2

..0..0..1..1..1..1....0..0..0..1..1..1....1..1..1..1..1..2....0..1..1..1..2..2

..0..0..1..1..1..2....0..0..0..1..1..2....1..1..1..1..1..2....1..1..1..2..2..2

..0..0..1..1..1..2....0..0..0..1..1..2....1..1..1..1..1..2....1..1..1..2..2..2

..1..1..1..1..1..2....1..1..1..1..2..2....1..2..2..2..2..2....1..1..1..2..2..2

CROSSREFS

Sequence in context: A249214 A249321 A109121 * A267972 A267995 A201547

Adjacent sequences:  A253002 A253003 A253004 * A253006 A253007 A253008

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 25 2014

STATUS

approved

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Last modified July 20 16:15 EDT 2019. Contains 325185 sequences. (Running on oeis4.)