A250713 Number of (6+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

138957, 3020711, 55337801, 770143684, 8760011881, 85271480338, 740660856529, 5881182605467, 43683438362156, 307067416264307, 2069449448447282, 13455140588648139, 85082498904491499, 525186983204091582

Offset

1,1

Comments

Row 6 of A250707

Links

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

Example

Some solutions for n=1
..0..0....0..1....0..1....0..0....1..0....1..1....0..1....0..1....1..0....0..0
..0..0....1..2....1..3....1..1....0..3....1..2....0..1....0..1....0..2....0..0
..0..0....1..2....1..3....1..1....3..0....0..3....0..1....0..3....0..2....0..1
..2..0....1..3....3..1....1..2....0..3....1..2....1..1....2..2....1..2....2..0
..0..3....1..3....1..3....0..3....1..3....2..2....0..2....3..2....2..2....0..3
..0..3....2..2....1..3....0..3....1..3....2..3....1..2....2..3....2..2....0..3
..3..2....2..3....3..3....3..3....2..2....3..3....3..1....2..3....2..2....3..1

Crossrefs

Sequence in context: A230032 A190386 A236276 * A236063 A234821 A221669

Adjacent sequences: A250710 A250711 A250712 * A250714 A250715 A250716

Keyword

nonn

Author

R. H. Hardin, Nov 26 2014

Status

approved