A224379 Number of 7Xn 0..2 arrays with rows unimodal and antidiagonals nondecreasing

2187, 419904, 9588028, 86251004, 495660330, 2231009824, 8684742989, 30944246553, 104711652679, 344919346826, 1122234055919, 3627085766299, 11631834618628, 36830849015498, 114465864361342, 347386072561498

Offset

1,1

Comments

Row 7 of A224374

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

Crossrefs

Sequence in context: A016771 A059979 A224315 * A016843 A016891 A016951

Adjacent sequences: A224376 A224377 A224378 * A224380 A224381 A224382

Keyword

nonn

Author

R. H. Hardin Apr 05 2013

Status

approved