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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A254204

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..31

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 * A097949 A268572 A117338

Adjacent sequences:  A254196 A254197 A254198 * A254200 A254201 A254202

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 26 2015

STATUS

approved

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Last modified October 17 16:51 EDT 2019. Contains 328120 sequences. (Running on oeis4.)