A184698 Number of strings of numbers x(i=1..n) in 0..4 with sum i*x(i) equal to n*4

1, 3, 9, 28, 78, 207, 504, 1169, 2574, 5439, 11071, 21841, 41846, 78193, 142787, 255441, 448444, 773966, 1314861, 2201731, 3637642, 5935817, 9574284, 15277075, 24130784, 37755124, 58545388, 90021407, 137320211, 207895383, 312495662

Offset

1,2

Comments

Column 4 of A184703

Links

R. H. Hardin, Table of n, a(n) for n = 1..170

Example

Some solutions for n=6
..2....3....3....3....1....3....4....2....2....0....2....3....3....4....1....1
..4....1....3....0....0....2....0....0....3....0....1....0....2....2....4....3
..2....3....2....0....3....4....0....4....0....0....1....3....1....0....0....2
..2....1....1....4....1....0....0....1....0....3....0....0....1....0....1....0
..0....0....1....1....2....1....4....0....2....0....1....0....2....2....1....1
..0....1....0....0....0....0....0....1....1....2....2....2....0....1....1....1

Crossrefs

Sequence in context: A373445 A294958 A047134 * A027099 A292328 A027090

Adjacent sequences: A184695 A184696 A184697 * A184699 A184700 A184701

Keyword

nonn

Author

R. H. Hardin Jan 20 2011

Status

approved