A184439 Number of strings of numbers x(i=1..n) in 0..7 with sum i*x(i)^2 equal to n*49.

1, 1, 5, 14, 101, 715, 3818, 19257, 109623, 541179, 2588583, 12533674, 57289175, 255004484, 1117915131, 4748188269, 19711864941, 80293980695, 319810672333, 1249298852482, 4793924733547, 18065184325915, 66940461343250

Offset

1,3

Comments

Column 7 of A184441

Links

R. H. Hardin, Table of n, a(n) for n = 1..53

Example

Some solutions for n=5
..4....6....2....6....1....7....3....5....4....0....2....6....2....6....0....3
..7....2....0....5....0....0....2....4....6....3....5....7....6....7....5....6
..5....0....0....5....4....0....1....7....2....7....5....5....6....3....5....0
..3....7....7....1....2....7....5....3....5....0....3....3....2....1....5....6
..2....1....3....4....6....0....5....1....3....4....4....0....3....4....2....2

Crossrefs

Sequence in context: A316421 A317424 A077262 * A370006 A375521 A316233

Adjacent sequences: A184436 A184437 A184438 * A184440 A184441 A184442

Keyword

nonn

Author

R. H. Hardin, Jan 14 2011

Status

approved