A223767 Number of nX5 0..1 arrays with rows, columns and antidiagonals unimodal and diagonals nondecreasing.

16, 101, 317, 782, 1748, 3699, 7564, 14980, 28778, 53619, 96979, 170525, 292045, 488120, 797778, 1277432, 2007477, 3101006, 4715203, 7066083, 10447376, 15254495, 22014688, 31424652, 44397084, 62117861, 86115779, 118347041, 161296967

Offset: 1

Author

R. H. Hardin Mar 27 2013

Keywords

• nonn

Comments

Column 5 of A223770

Examples

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

Links

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

Formula

Empirical: a(n) = (1/3628800)*n^10 - (1/241920)*n^9 + (23/120960)*n^8 - (43/40320)*n^7 + (11293/172800)*n^6 - (1721/2304)*n^5 + (1557823/181440)*n^4 - (3058823/60480)*n^3 + (99347/350)*n^2 - (196177/210)*n + 1664 for n>6