A202548 Number of nX7 nonnegative integer arrays each row and column an ascent sequence (interior element no greater than one plus up-steps preceding it)

1, 64, 10438, 3249298, 1605067272, 1078490778110, 876480920594230, 794166642153146254, 762568739496974188204, 753928983875460610050918, 755888883107420734464676952, 762735395600844011293201732846

Offset

1,2

Comments

Column 7 of A202549

Links

R. H. Hardin, Table of n, a(n) for n = 1..76

Example

Some solutions for n=4
..0..0..0..0..0..0..0....0..0..0..0..0..0..0....0..0..0..0..0..0..0
..0..0..0..1..0..0..0....0..0..0..1..1..1..1....0..0..0..1..1..1..1
..0..0..0..0..0..1..0....0..0..0..0..0..1..2....0..0..0..0..1..1..1
..0..0..1..2..0..1..0....0..1..1..2..2..1..3....0..0..0..1..2..2..2

Crossrefs

Sequence in context: A362541 A268055 A268078 * A374886 A364520 A376524

Adjacent sequences: A202545 A202546 A202547 * A202549 A202550 A202551

Keyword

nonn

Author

R. H. Hardin Dec 20 2011

Status

approved