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A250520 Number of (n+1)X(n+1) 0..2 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing x(i,j)-x(i-1,j) in the j direction 0
50, 1180, 21955, 300131, 3183434, 27910024, 212707851, 1462376991, 9314700106, 56025183452, 322542598187 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A250527

LINKS

Table of n, a(n) for n=1..11.

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A200207 A160152 A318760 * A017766 A187459 A035720

Adjacent sequences:  A250517 A250518 A250519 * A250521 A250522 A250523

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 24 2014

STATUS

approved

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Last modified January 28 12:42 EST 2022. Contains 350656 sequences. (Running on oeis4.)