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A254199
Number of length n 1..(3+2) arrays with no leading or trailing partial sum equal to a prime
1
2, 1, 4, 9, 21, 47, 118, 333, 984, 3362, 12643, 39490, 98542, 227138, 581068, 1805114, 6540668, 24406560, 85426548, 274421967, 815755674, 2293410096, 6495970695, 20483223847, 74509476318, 290215121856, 1104108812114, 3894326230239
OFFSET
1,1
COMMENTS
Column 3 of A254204
LINKS
EXAMPLE
All solutions for n=4
..4....1....4....4....1....4....4....4....1
..4....3....2....5....5....4....2....2....3
..2....2....4....5....3....4....2....3....5
..4....4....4....4....1....4....4....1....1
CROSSREFS
Sequence in context: A015943 A006445 A174255 * A343398 A097949 A268572
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 26 2015
STATUS
approved