A184436 Number of strings of numbers x(i=1..n) in 0..4 with sum i*x(i)^2 equal to n*16

1, 1, 3, 10, 32, 116, 368, 1235, 4321, 13396, 40668, 124627, 362283, 1030513, 2887111, 7874749, 21054468, 55326873, 142607396, 361404953, 901518960, 2213631284, 5356287900, 12780944283, 30087543948, 69923248394, 160510425840

Offset

1,3

Comments

Column 4 of A184441

Links

R. H. Hardin, Table of n, a(n) for n = 1..106

Example

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

Crossrefs

Sequence in context: A306295 A356499 A134952 * A149028 A174573 A126183

Adjacent sequences: A184433 A184434 A184435 * A184437 A184438 A184439

Keyword

nonn

Author

R. H. Hardin Jan 14 2011

Status

approved