A258627 Number of length n 1..(4+1) arrays with every leading partial sum divisible by 2, 3, 5 or 7.

4, 20, 80, 264, 809, 2506, 8432, 30362, 109520, 391836, 1408127, 5002188, 17308136, 59463783, 210199210, 774578726, 2918410859, 10951007498, 40430881133, 146973680685, 527988483182, 1880363101497, 6679919969564, 23928818399537

Offset

1,1

Comments

Column 4 of A258631.

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

Some solutions for n=8
..3....5....5....4....5....4....4....2....4....5....5....4....4....2....4....5
..5....5....3....4....3....3....1....5....2....5....5....1....2....4....3....4
..4....5....2....2....4....5....4....5....1....2....4....3....1....3....5....3
..3....3....4....4....4....2....3....3....5....3....2....4....3....1....3....2
..1....2....2....4....4....2....2....1....4....3....4....4....5....4....3....2
..4....1....4....4....1....4....2....2....4....4....4....2....1....1....2....2
..2....1....1....2....3....4....2....2....5....3....2....2....4....1....5....4
..4....4....4....4....4....2....2....4....2....3....1....4....2....4....1....2

Crossrefs

Cf. A258631.

Sequence in context: A125669 A295116 A303508 * A082138 A074358 A255050

Adjacent sequences: A258624 A258625 A258626 * A258628 A258629 A258630

Keyword

nonn

Author

R. H. Hardin, Jun 06 2015

Status

approved