A223858 Number of n X n 0..3 arrays with rows and antidiagonals unimodal and columns nondecreasing

4, 100, 4884, 315124, 23738426, 1989679315, 181330154458, 17720685250743, 1838270364212150, 200766237618388230, 22925992371163981667, 2721355255765297425689

Offset

1,1

Comments

Diagonal of A223864

Links

Table of n, a(n) for n=1..12.

Example

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

Crossrefs

Sequence in context: A127776 A266524 A224167 * A223981 A224385 A249939

Adjacent sequences: A223855 A223856 A223857 * A223859 A223860 A223861

Keyword

nonn

Author

R. H. Hardin Mar 28 2013

Status

approved