A255711 Number of length n 1..(3+2) arrays with no leading partial sum equal to a prime and no consecutive values equal

2, 4, 10, 21, 47, 102, 256, 754, 2169, 5999, 17237, 49510, 132956, 339522, 900236, 2620855, 8077245, 24619352, 71983144, 205409149, 584195761, 1647027286, 4572955010, 12705583667, 36182897964, 106766407391, 326242477740

Offset

1,1

Comments

Column 3 of A255716

Links

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

Example

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

Crossrefs

Cf. A255716

Sequence in context: A371358 A018003 A328692 * A204804 A328693 A165136

Adjacent sequences: A255708 A255709 A255710 * A255712 A255713 A255714

Keyword

nonn

Author

R. H. Hardin, Mar 03 2015

Status

approved