A255710 Number of length n 1..(2+2) arrays with no leading partial sum equal to a prime and no consecutive values equal

2, 2, 4, 6, 8, 14, 19, 33, 69, 162, 325, 616, 1314, 2874, 6099, 11780, 21630, 42778, 95379, 225424, 532771, 1184433, 2434239, 4904932, 10213447, 21612164, 44580230, 89065496, 178617292, 373380471, 821875838, 1887456086, 4465488647

Offset

1,1

Comments

Column 2 of A255716

Links

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

Example

All solutions for n=4
..1....4....1....1....1....4
..3....2....3....3....3....2
..2....4....4....4....2....3
..3....2....1....2....4....1

Crossrefs

Cf. A255716

Sequence in context: A145465 A291055 A266949 * A329137 A239851 A153958

Adjacent sequences: A255707 A255708 A255709 * A255711 A255712 A255713

Keyword

nonn

Author

R. H. Hardin, Mar 03 2015

Status

approved