A258634 Number of length 3 1..(n+1) arrays with every leading partial sum divisible by 2, 3, 5 or 7.

4, 18, 45, 80, 125, 179, 257, 345, 468, 560, 761, 888, 1153, 1433, 1773, 1990, 2492, 2757, 3339, 3896, 4557, 4956, 5839, 6656, 7629, 8581, 9741, 10412, 11889, 12630, 14121, 15621, 17291, 18979, 21036, 22123, 24235, 26337, 28748, 30115, 33021, 34520

Offset

1,1

Comments

Row 3 of A258631.

Links

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

Example

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

Crossrefs

Cf. A258631.

Sequence in context: A366985 A115077 A278046 * A280599 A066153 A213926

Adjacent sequences: A258631 A258632 A258633 * A258635 A258636 A258637

Keyword

nonn

Author

R. H. Hardin, Jun 06 2015

Status

approved