A184239 Number of strings of numbers x(i=1..n) in 0..8 with sum i^2*x(i)^2 equal to n^2*64.

1, 1, 1, 1, 5, 88, 571, 3719, 32608, 229978, 1944146, 12785619, 92175303, 562796025, 3586783831, 21282332690, 123857108265, 711033477793, 3887110307164, 21647422702326, 114426238905952, 619561557445710

Offset: 1

Author

R. H. Hardin Jan 10 2011

Keywords

• nonn

Comments

Column 8 of A184240

Examples

			All solutions for n=5
..0....4....4....6....0
..0....2....8....7....0
..8....4....4....6....0
..8....8....7....3....0
..0....4....4....6....8