A224176 Number of 5 X n 0..3 arrays with rows, diagonals and antidiagonals unimodal and columns nondecreasing.

56, 3136, 87878, 1460836, 16625026, 143558572, 1012166273, 6125081331, 32894121939, 160366617391, 721130521043, 3026020511079, 11954211905590, 44767125938612, 159803658410914, 546205629183576, 1794213349019225, 5681633554205167, 17388727776795588, 51546300902092728

Offset: 1

Author

R. H. Hardin, Mar 31 2013

Keywords

• nonn

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210
• R. H. Hardin, Empirical polynomial of degree 30

Crossrefs

Row 5 of A224173.

Formula

Empirical polynomial of degree 30 (see link above).

Extensions

Name corrected by Andrew Howroyd, Mar 18 2025