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A250845 Number of (n+1)X(n+1) 0..3 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction 1
100, 2457, 44797, 626416, 7134786, 69543783, 601566177, 4741091128, 34703305546, 239290928999, 1571038806045, 9901650019496, 60291096166330, 356456047451631, 2054525997174241, 11582011158980816, 64029681309724210, 347906811859565887 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A250853

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..32

EXAMPLE

Some solutions for n=3

..3..3..3..2....2..2..2..2....3..2..3..3....3..3..2..2....3..2..2..2

..1..1..1..2....0..0..1..1....2..2..3..3....1..2..2..2....0..1..1..2

..0..0..0..1....0..0..2..2....0..0..2..2....2..3..3..3....0..1..1..2

..0..2..2..3....1..1..3..3....0..1..3..3....0..1..2..2....0..2..2..3

CROSSREFS

Sequence in context: A114777 A128988 A075822 * A200937 A112889 A118490

Adjacent sequences:  A250842 A250843 A250844 * A250846 A250847 A250848

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 28 2014

STATUS

approved

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Last modified September 27 03:21 EDT 2020. Contains 337380 sequences. (Running on oeis4.)