A202733 Number of nX6 nonnegative integer arrays each row and column an ascent sequence (interior element no greater than one plus up-steps preceding it) and the lower right element equal to min(n,6)-1

1, 16, 406, 10296, 97794, 44976, 182593546, 171227525652, 82937584072426, 28117713663244916, 7789814305950338052, 1924690312553582114842, 446311604380789427924132, 100047008743872523216459380

Offset

1,2

Comments

Column 6 of A202735

Links

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

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

Crossrefs

Sequence in context: A326102 A300808 A301447 * A261833 A172205 A209362

Adjacent sequences: A202730 A202731 A202732 * A202734 A202735 A202736

Keyword

nonn

Author

R. H. Hardin Dec 23 2011

Status

approved