A224267 Number of 7Xn 0..2 arrays with rows and antidiagonals unimodal and columns nondecreasing

36, 1296, 24842, 296646, 2485967, 15921905, 83124099, 371699763, 1478187738, 5375576014, 18237850918, 58547208334, 179599458173, 530112786109, 1512954573026, 4190185564746, 11292006460221, 29674041029167

Offset

1,1

Comments

Row 7 of A224262

Links

R. H. Hardin, Table of n, a(n) for n = 1..41

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

Crossrefs

Sequence in context: A158700 A144128 A223405 * A223924 A224352 A224194

Adjacent sequences: A224264 A224265 A224266 * A224268 A224269 A224270

Keyword

nonn

Author

R. H. Hardin Apr 02 2013

Status

approved