A202734 Number of nX7 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,7)-1

1, 32, 2062, 184848, 12219684, 182593546, 51871384, 4025241096124, 36422682546205910, 131056226079716655758, 280757551199231043765836, 441077319990976298095629110, 574350179584926874304293083870

Offset

1,2

Comments

Column 7 of A202735

Links

R. H. Hardin, Table of n, a(n) for n = 1..87

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

Crossrefs

Sequence in context: A300180 A277426 A159364 * A268054 A268077 A202547

Adjacent sequences: A202731 A202732 A202733 * A202735 A202736 A202737

Keyword

nonn

Author

R. H. Hardin Dec 23 2011

Status

approved