A223664 Number of n X n 0..1 arrays with rows, diagonals and antidiagonals unimodal

2, 16, 292, 6454, 136289, 2715255, 51831694, 962697852, 17643516790, 323311474180

Offset

1,1

Comments

Diagonal of A223669

Links

Table of n, a(n) for n=1..10.

Example

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

Crossrefs

Sequence in context: A009795 A182562 A112722 * A189611 A189689 A188740

Adjacent sequences: A223661 A223662 A223663 * A223665 A223666 A223667

Keyword

nonn

Author

R. H. Hardin Mar 25 2013

Status

approved