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A258626
Number of length n 1..(3+1) arrays with every leading partial sum divisible by 2, 3, 5 or 7
1
3, 12, 45, 130, 331, 834, 2115, 5726, 16873, 50003, 142116, 400694, 1157686, 3355089, 9458656, 26092189, 72995360, 213171551, 647222852, 1987679608, 6016219942, 17773719595, 51564943489, 148469880307, 426108755766, 1217647287273
OFFSET
1,1
COMMENTS
Column 3 of A258631
LINKS
EXAMPLE
Some solutions for n=8
..2....3....4....2....2....2....3....3....3....2....2....4....3....3....2....2
..2....3....2....1....2....1....4....2....1....1....2....2....3....1....1....3
..3....1....4....2....2....3....3....3....2....4....1....1....1....4....1....2
..1....1....4....2....2....2....2....4....2....3....4....1....3....4....2....1
..1....1....4....2....4....2....3....2....4....4....3....2....4....2....2....1
..1....3....2....1....3....2....1....1....2....4....3....2....2....2....4....3
..4....2....1....2....3....3....2....1....1....3....3....4....2....2....4....4
..4....2....4....2....4....3....2....4....1....1....2....4....3....2....4....2
CROSSREFS
Sequence in context: A339066 A260146 A229936 * A064017 A005320 A062561
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jun 06 2015
STATUS
approved