A250639 Number of (7+1)X(n+1) 0..2 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

18131, 130848, 994281, 6421141, 37072806, 195029867, 955747123, 4434468137, 19743654581, 85056866597, 357013012798, 1466786801347, 5922724257697, 23575899972899, 92755869280688, 361451442730899, 1397475019582942

Offset

1,1

Comments

Row 7 of A250632

Links

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

R. H. Hardin, Empirical recurrence of order 79

Formula

Empirical recurrence of order 79 (see link above)

Example

Some solutions for n=2
..0..0..0....0..0..0....0..0..1....0..0..0....0..0..1....0..0..0....0..0..1
..0..0..2....0..0..2....0..1..0....2..0..2....0..0..1....1..0..1....0..1..1
..0..0..2....1..1..1....1..0..2....0..2..1....0..0..1....0..1..1....0..1..1
..0..1..2....0..2..1....0..1..2....1..1..2....0..0..2....1..0..2....0..1..2
..0..1..2....1..1..2....0..1..2....0..2..1....0..1..1....0..1..1....0..2..1
..1..1..2....1..1..2....1..2..1....2..1..2....0..1..1....0..1..1....1..1..2
..2..1..2....0..2..2....2..1..2....1..2..1....2..2..2....0..1..2....1..1..2
..1..2..1....2..2..2....1..2..1....2..1..2....2..2..2....1..2..2....2..2..1

Crossrefs

Sequence in context: A106769 A224571 A251832 * A205242 A172936 A025029

Adjacent sequences: A250636 A250637 A250638 * A250640 A250641 A250642

Keyword

nonn

Author

R. H. Hardin, Nov 26 2014

Status

approved