A254214 Number of length n 1..(4+2) arrays with no leading or trailing partial sum equal to a prime and no consecutive values equal

3, 2, 11, 22, 56, 136, 383, 1070, 3897, 13372, 36290, 91998, 263764, 898044, 3423582, 12431962, 40311611, 119109004, 342803738, 1087179458, 4009074487, 15810174070, 60200487014, 208013211868, 641452364953

Offset

1,1

Comments

Column 4 of A254218

Links

Table of n, a(n) for n=1..25.

Example

Some solutions for n=4
..1....1....1....4....4....4....6....4....4....6....1....4....1....6....1....6
..5....5....3....2....5....6....3....2....6....4....5....6....5....4....3....4
..3....6....2....6....3....5....5....3....2....2....3....2....4....6....5....5
..6....4....4....4....6....1....4....1....6....6....1....4....6....4....1....1

Crossrefs

Sequence in context: A305491 A358589 A087629 * A362995 A178384 A372803

Adjacent sequences: A254211 A254212 A254213 * A254215 A254216 A254217

Keyword

nonn

Author

R. H. Hardin, Jan 26 2015

Status

approved