A223638 Number of n X n 0..1 arrays with rows, columns, diagonals and antidiagonals unimodal

2, 16, 218, 2962, 36947, 428187, 4682514, 49045356, 497721760, 4944054774

Offset

1,1

Comments

Diagonal of A223644

Links

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

Example

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

Crossrefs

Sequence in context: A267782 A012164 A264543 * A188688 A188844 A187657

Adjacent sequences: A223635 A223636 A223637 * A223639 A223640 A223641

Keyword

nonn

Author

R. H. Hardin Mar 24 2013

Status

approved