A224385 Number of n X n 0..3 arrays with diagonals and antidiagonals unimodal and rows nondecreasing

4, 100, 6094, 497958, 45648753, 4364554008, 424124440444, 41437298593764, 4056267677083719, 397503667576768219

Offset

1,1

Comments

Diagonal of A224391

Links

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

Example

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

Crossrefs

Sequence in context: A224167 A223858 A223981 * A249939 A224018 A198278

Adjacent sequences: A224382 A224383 A224384 * A224386 A224387 A224388

Keyword

nonn

Author

R. H. Hardin Apr 05 2013

Status

approved