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A250710 Number of (3+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
2435, 30719, 301632, 2492054, 18235293, 122690762, 774796977, 4673805813, 27196779938, 154066279127, 854122044467, 4658151131121, 25068017810185, 133534557525131, 705429509431519, 3702863919486346, 19335819140017317 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 3 of A250707

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

R. H. Hardin, Empirical recurrence of order 65

FORMULA

Empirical recurrence of order 65 (see link above)

EXAMPLE

Some solutions for n=2

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

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

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

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

CROSSREFS

Sequence in context: A229871 A192767 A341286 * A278196 A032734 A345518

Adjacent sequences:  A250707 A250708 A250709 * A250711 A250712 A250713

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 26 2014

STATUS

approved

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Last modified December 2 17:48 EST 2021. Contains 349445 sequences. (Running on oeis4.)