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

Author

R. H. Hardin Apr 02 2013

Keywords

• nonn

Comments

Row 6 of A224281

Examples

			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
		

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)