A183960 Number of strings of numbers x(i=1..9) in 0..n with sum i^2*x(i) equal to n*81.

3, 37, 339, 1805, 7250, 23611, 65909, 163588, 369777, 775045, 1525468, 2847243, 5078854, 8712108, 14442500, 23231857, 36384941, 55641864, 83284699, 122267246, 176362928, 250341134, 350161711, 483206291, 658533921, 887179738, 1182476762

Offset: 1

Author

R. H. Hardin Jan 08 2011

Keywords

• nonn

Comments

Row 9 of A183953

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..200