A224194 Number of 7Xn 0..2 arrays with rows unimodal and columns nondecreasing

36, 1296, 28176, 424326, 4844576, 44435746, 340780382, 2249643632, 13068669308, 67970305364, 320903298144, 1390873688506, 5586138847981, 20953028554541, 73888808853350, 246365532350644, 780525967950004, 2359724042194860

Offset

1,1

Comments

Row 7 of A224190

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

R. H. Hardin, Empirical polynomial of degree 28

Formula

Empirical polynomial of degree 28 (see link above)

Example

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

Crossrefs

Sequence in context: A224267 A223924 A224352 * A224011 A300357 A009980

Adjacent sequences: A224191 A224192 A224193 * A224195 A224196 A224197

Keyword

nonn

Author

R. H. Hardin Apr 01 2013

Status

approved