A224187 Number of nX5 0..2 arrays with rows unimodal and columns nondecreasing.

86, 1600, 14751, 89380, 408222, 1519738, 4844576, 13669953, 34953776, 82399174, 181434331, 376946128, 744873156, 1409068188, 2565196232, 4513845865, 7705502706, 12800568660, 20748212991, 32888515396, 51083111090, 77880377510

Offset: 1

Author

R. H. Hardin Apr 01 2013

Keywords

• nonn

Comments

Column 5 of A224190

Examples

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

Links

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

Formula

Empirical: a(n) = (1009/907200)*n^10 + (913/36288)*n^9 + (15121/60480)*n^8 + (8677/6048)*n^7 + (226987/43200)*n^6 + (110621/8640)*n^5 + (3804217/181440)*n^4 + (206081/9072)*n^3 + (130433/8400)*n^2 + (3793/630)*n + 1