A223736 Number of n X n 0..2 arrays with rows, columns, diagonals and antidiagonals unimodal

3, 81, 5600, 480236, 41586328, 3437215802, 268717054875, 19964011820443

Offset

1,1

Comments

Diagonal of A223742

Links

Table of n, a(n) for n=1..8.

Example

Some solutions for n=3
..0..1..0....0..0..0....2..0..0....1..1..1....0..2..0....2..2..2....1..2..0
..0..0..0....1..2..2....2..1..0....1..1..2....0..2..2....2..2..1....2..2..2
..0..0..0....2..2..2....2..2..1....0..1..0....0..0..1....1..2..1....1..1..2

Crossrefs

Sequence in context: A013732 A292974 A209587 * A355157 A207229 A223717

Adjacent sequences: A223733 A223734 A223735 * A223737 A223738 A223739

Keyword

nonn

Author

R. H. Hardin Mar 26 2013

Status

approved