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A254217 Number of length n 1..(7+2) arrays with no leading or trailing partial sum equal to a prime and no consecutive values equal. 0
5, 12, 48, 168, 766, 3720, 18214, 81428, 362910, 1828848, 9781293, 49824190, 241134125, 1198202218, 6489872942, 36558663886, 196996500006, 982525116524, 4694315336320, 23819615009274, 140719786602875, 913403203820358, 5715151962243604, 32271875770787666 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..24.

EXAMPLE

Some solutions for n=4:

..6....4....4....6....4....8....4....4....1....4....1....8....1....4....9....6

..8....8....6....9....6....2....2....8....3....2....8....1....5....8....3....4

..2....2....2....3....5....5....3....3....5....3....5....6....6....4....4....5

..4....6....8....9....9....1....1....9....1....9....1....9....4....8....8....1

CROSSREFS

Column k=7 of A254218.

Sequence in context: A195541 A006078 A046612 * A211951 A009425 A009416

Adjacent sequences:  A254214 A254215 A254216 * A254218 A254219 A254220

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 26 2015

EXTENSIONS

a(19)-a(24) from Alois P. Heinz, Jan 27 2015

STATUS

approved

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Last modified November 11 16:01 EST 2019. Contains 329019 sequences. (Running on oeis4.)