A183945 Number of strings of numbers x(i=1..n) in 0..n with sum i^2*x(i) equal to n^3.

1, 1, 2, 8, 53, 398, 3539, 34847, 369777, 4178324, 49657281, 615829513, 7919376470, 105084836323, 1433178519184, 20025465352373, 285916536136122, 4162074154247193, 61656883471361641, 928025931557339662

Offset: 1

Author

R. H. Hardin Jan 08 2011

Keywords

• nonn

Comments

Diagonal of A183953

Examples

			All solutions for n=4
..0....2....4....1....0....3....4....0
..3....3....2....1....0....1....3....4
..4....2....4....3....0....1....0....0
..1....2....1....2....4....3....3....3
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..23