A184695 Number of strings of numbers x(i=1..n) in 0..n with sum i*x(i) equal to n^2

1, 2, 6, 28, 156, 985, 6575, 46037, 332729, 2467215, 18668476, 143639875, 1120736308, 8848906376, 70585065382, 568063412434, 4607556545105, 37630962749979, 309239715248494, 2555320702164649, 21220771891605441

Offset

1,2

Comments

Diagonal of A184703

Links

R. H. Hardin, Table of n, a(n) for n = 1..35

Example

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

Crossrefs

Sequence in context: A004984 A326928 A277381 * A086633 A354311 A201950

Adjacent sequences: A184692 A184693 A184694 * A184696 A184697 A184698

Keyword

nonn

Author

R. H. Hardin Jan 20 2011

Status

approved