A223924 Number of 7Xn 0..2 arrays with rows and antidiagonals unimodal and columns nondecreasing

36, 1296, 26494, 359344, 3588729, 28247478, 183720802, 1022160764, 4994941017, 21887522070, 87447220301, 322906269126, 1114442061385, 3628609366226, 11233293675288, 33279853366178, 94865889314403, 261354658486111

Offset

1,1

Comments

Row 7 of A223918

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

Crossrefs

Sequence in context: A144128 A223405 A224267 * A224352 A224194 A224011

Adjacent sequences: A223921 A223922 A223923 * A223925 A223926 A223927

Keyword

nonn

Author

R. H. Hardin Mar 29 2013

Status

approved