A223998 Number of nX7 0..2 arrays with antidiagonals unimodal and rows and diagonals nondecreasing.

36, 736, 8291, 71061, 559188, 4368458, 34534687, 276286000, 2229871293, 18115082917, 147889219961, 1211856739505, 9958518859510, 82010005661441, 676451232895869, 5586333937854878, 46174727441274521, 381916881456838766

Offset: 1

Author

R. H. Hardin Mar 30 2013

Keywords

• nonn

Comments

Column 7 of A223999

Examples

			Some solutions for n=3
..0..0..0..0..0..1..1....0..1..1..1..1..1..1....0..0..0..0..1..1..1
..0..0..0..0..1..1..2....0..0..1..1..1..1..2....0..1..1..1..1..2..2
..1..1..1..2..2..2..2....0..0..1..1..1..2..2....0..0..1..1..1..1..2
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210
• R. H. Hardin, Empirical recurrence of order 54

Formula

Empirical recurrence of order 54 (see link above)