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A254224 Number of length 7 1..(n+2) arrays with no leading or trailing partial sum equal to a prime and no consecutive values equal 1
0, 2, 15, 383, 633, 6490, 18214, 60168, 97089, 296955, 420163, 1046085, 1799943, 3545675, 4664339, 9251052, 11630683, 20703803, 29730723, 47075466, 56991009, 93151404, 122440340, 182865306, 239287220, 341720757, 401640735, 596658745 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 7 of A254218

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..67

EXAMPLE

Some solutions for n=4

..4....6....6....4....1....6....4....4....6....6....6....1....6....1....4....4

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

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

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

..4....6....4....5....6....1....6....4....6....6....6....2....4....2....6....4

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

..6....1....4....6....4....6....1....1....4....6....6....4....6....6....6....4

CROSSREFS

Sequence in context: A231443 A068391 A215743 * A071102 A272899 A060381

Adjacent sequences:  A254221 A254222 A254223 * A254225 A254226 A254227

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 26 2015

STATUS

approved

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Last modified May 17 22:15 EDT 2021. Contains 343992 sequences. (Running on oeis4.)