A224315 Number of 7Xn 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

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