A224315 Number of 7 X n 0..2 arrays with diagonals and rows unimodal and antidiagonals nondecreasing.

2187, 419904, 4634768, 22071219, 80083648, 268379906, 911404794, 3202146197, 11485486125, 41212527412, 145413457614, 498294091308, 1645129036705, 5209884539118, 15798173688229, 45874155195909, 127717720870044

Offset

1,1

Comments

Row 7 of A224310.

Links

R. H. Hardin, Table of n, a(n) for n = 1..159

R. H. Hardin, Empirical polynomial of degree 28

Formula

Empirical polynomial of degree 28 (see link above).

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..1....0..0..0....0..0..1....0..0..0....0..0..2....0..1..1
..0..0..1....0..2..1....0..0..2....0..1..2....1..1..0....0..2..0....2..1..0
..0..2..0....2..2..2....0..2..2....2..2..1....1..0..0....2..2..0....1..0..0
..2..0..0....2..2..2....2..2..0....2..1..1....2..2..0....2..2..1....0..0..0
..1..0..0....2..2..0....2..1..0....2..1..0....2..0..0....2..1..0....1..0..0
..0..2..0....2..2..0....1..2..1....1..1..1....0..2..0....2..2..1....2..2..1

Crossrefs

Cf. A224310.

Sequence in context: A224017 A016771 A059979 * A224379 A016843 A016891

Adjacent sequences: A224312 A224313 A224314 * A224316 A224317 A224318

Keyword

nonn

Author

R. H. Hardin, Apr 03 2013

Status

approved