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A258625 Number of length n 1..(2+1) arrays with every leading partial sum divisible by 2, 3, 5 or 7 1
2, 6, 18, 50, 105, 181, 316, 560, 969, 1777, 3699, 8370, 18297, 36978, 73912, 155816, 335928, 697052, 1360137, 2539247, 4757378, 9452951, 20357207, 46362252, 107298090, 244529803, 538892048, 1146917302, 2392827002, 4981802096 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A258631

LINKS

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

EXAMPLE

Some solutions for n=8

..3....2....3....2....3....3....2....2....3....2....2....2....3....2....3....2

..3....3....2....3....1....1....1....1....1....1....3....3....2....2....1....3

..1....2....3....2....3....3....2....2....2....2....2....3....1....3....1....2

..1....1....1....1....2....2....1....3....1....2....1....1....3....2....1....1

..2....2....3....2....3....3....3....2....2....1....1....3....3....1....1....1

..2....2....3....2....2....2....3....2....3....2....3....3....2....2....3....3

..3....2....1....3....1....2....2....3....2....2....3....3....2....3....2....2

..1....1....2....1....1....2....1....1....1....3....1....3....2....3....2....2

CROSSREFS

Cf. A258631

Sequence in context: A059413 A256828 A197055 * A062026 A048495 A089380

Adjacent sequences:  A258622 A258623 A258624 * A258626 A258627 A258628

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jun 06 2015

STATUS

approved

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Last modified September 22 03:20 EDT 2021. Contains 347605 sequences. (Running on oeis4.)