A184313 Number of strings of numbers x(i=1..n) in 0..4 with Sum_{i=1..n} i^2*x(i)^3 = n^2*64.

1, 1, 1, 1, 2, 2, 5, 16, 68, 244, 1106, 4041, 15802, 60716, 234319, 885466, 3369738, 12612488, 47251424, 174691216, 644760884, 2353213266, 8557977690, 30825999521, 110546795278, 393117952349, 1390864413489, 4884724958228, 17059662985333, 59193590868065, 204181359943483

Offset: 0

Author

R. H. Hardin, Jan 10 2011

Keywords

• nonn

Examples

			All solutions for n=5:
..0....0
..0....0
..0....4
..0....4
..4....0
		

Links

• Alois P. Heinz, Table of n, a(n) for n = 0..100 (terms n = 1..31 from R. H. Hardin)

Crossrefs

Column 4 of A184318.

Extensions

a(0)=1 prepended by Alois P. Heinz, Nov 29 2024