A224285 Number of 6Xn 0..3 arrays with diagonals and rows unimodal and antidiagonals nondecreasing

4096, 1600000, 37128051, 356222482, 2425304290, 14587480744, 86539248276, 519675953580, 3101250505830, 17906548084860, 98091759991859, 504379639489778, 2424565118584031, 10897029351109181, 45902682124075154

Offset

1,1

Comments

Row 6 of A224281

Links

R. H. Hardin, Table of n, a(n) for n = 1..102

R. H. Hardin, Empirical polynomial of degree 36

Formula

Empirical polynomial of degree 36 (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..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0
..2..0..0....0..0..3....0..0..1....0..0..0....1..2..1....0..0..0....2..2..1
..1..2..1....2..3..2....0..3..1....2..2..0....2..1..1....3..1..1....3..3..1
..2..1..1....3..2..0....3..1..0....3..2..1....3..1..0....1..1..1....3..2..0
..2..2..3....2..3..1....3..3..3....2..1..0....3..2..1....3..3..0....2..2..2

Crossrefs

Sequence in context: A224028 A269206 A183816 * A224208 A017034 A017118

Adjacent sequences: A224282 A224283 A224284 * A224286 A224287 A224288

Keyword

nonn

Author

R. H. Hardin Apr 02 2013

Status

approved