A184433 Number of strings of numbers x(i=1..n) in 0..n with sum i*x(i)^2 equal to n^3

1, 1, 2, 10, 39, 436, 3818, 38560, 513211, 6729888, 94975257, 1514956607, 24870079005, 430238381615, 7946503640262, 151928007427027, 3024975882657404, 62893815171137570

Offset

1,3

Comments

Diagonal of A184441

Links

Table of n, a(n) for n=1..18.

Example

Some solutions for n=5
..5....3....4....2....5....1....0....3....0....0....4....1....0....0....2....3
..2....2....0....3....0....4....5....0....2....3....1....0....1....0....0....4
..2....1....4....1....0....2....5....0....2....3....3....5....3....0....2....0
..0....5....2....5....5....0....0....3....5....0....0....1....2....0....4....4
..4....1....3....0....0....4....0....4....1....4....4....3....4....5....3....2

Crossrefs

Sequence in context: A151311 A151312 A253590 * A339090 A244376 A009338

Adjacent sequences: A184430 A184431 A184432 * A184434 A184435 A184436

Keyword

nonn

Author

R. H. Hardin Jan 14 2011

Status

approved