A258623 Number of length n 1..(n+1) arrays with every leading partial sum divisible by 2, 3, 5 or 7

1, 6, 45, 264, 2094, 20462, 290231, 4010997, 78604973, 1349514483, 35927257375, 779039452374, 22813001639693, 625228016584233, 20522243952244064, 592853223364296015, 23932818802986466719, 759286889246491909554

Offset

1,2

Comments

Diagonal of A258631

Links

R. H. Hardin, Table of n, a(n) for n = 1..87

Example

Some solutions for n=8
..2....2....2....2....2....2....2....2....2....2....2....2....2....2....2....2
..1....1....1....1....1....1....1....1....1....1....1....1....2....1....2....1
..9....4....2....2....1....9....3....3....6....1....3....3....1....1....1....1
..3....9....9....4....3....6....8....4....7....1....2....9....3....5....9....1
..5....8....2....3....8....6....1....4....8....9....8....1....7....1....6....3
..7....4....8....3....9....4....6....7....9....6....4....5....1....6....7....2
..1....7....3....3....1....8....3....6....5....2....1....5....5....8....3....5
..4....9....6....4....8....6....9....9....2....4....9....1....3....1....2....9

Crossrefs

Cf. A258631

Sequence in context: A288835 A162230 A258350 * A003486 A262415 A297645

Adjacent sequences: A258620 A258621 A258622 * A258624 A258625 A258626

Keyword

nonn

Author

R. H. Hardin, Jun 06 2015

Status

approved