A255712 Number of length n 1..(4+2) arrays with no leading partial sum equal to a prime and no consecutive values equal

3, 8, 26, 81, 261, 936, 3435, 12406, 45637, 165303, 579197, 2056418, 7724487, 30188921, 117283664, 443965914, 1645885655, 6011641972, 21768376301, 79175516820, 293501032240, 1120198277690, 4414668160947, 17781778665225

Offset

1,1

Comments

Column 4 of A255716

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

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

Crossrefs

Cf. A255716

Sequence in context: A205775 A331320 A148802 * A194690 A148803 A148804

Adjacent sequences: A255709 A255710 A255711 * A255713 A255714 A255715

Keyword

nonn

Author

R. H. Hardin, Mar 03 2015

Status

approved