A224396 Number of 7Xn 0..3 arrays with diagonals and antidiagonals unimodal and rows nondecreasing

16384, 10000000, 279128617, 2780848289, 17642791909, 90682660877, 424124440444, 1895527656502, 8186764103582, 33998418651060, 134714450368164, 506671733476920, 1805110329656189, 6093246282673576, 19519515186829602

Offset

1,1

Comments

Row 7 of A224391

Links

R. H. Hardin, Table of n, a(n) for n = 1..23

Example

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

Crossrefs

Sequence in context: A236222 A269207 A016963 * A224029 A224286 A224209

Adjacent sequences: A224393 A224394 A224395 * A224397 A224398 A224399

Keyword

nonn

Author

R. H. Hardin Apr 05 2013

Status

approved