A224032 Number of n X n 0..1 arrays with antidiagonals unimodal and rows and diagonals nondecreasing.

2, 8, 37, 168, 734, 3107, 12856, 52356, 210890, 843084, 3353221, 13291387, 52567559, 207621934, 819398693, 3232688584, 12752707695, 50314551092, 198559706395, 783841017918, 3095442338516, 12228799206771

Offset

1,1

Comments

Diagonal of A224038

Links

Table of n, a(n) for n=1..22.

Example

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

Crossrefs

Sequence in context: A375518 A183908 A280119 * A046814 A361698 A305547

Adjacent sequences: A224029 A224030 A224031 * A224033 A224034 A224035

Keyword

nonn

Author

R. H. Hardin, Mar 30 2013

Status

approved