A254534 Number of length n 1..(3+2) arrays with no leading partial sum equal to a prime

2, 5, 15, 45, 135, 421, 1466, 5403, 19417, 69205, 249569, 883285, 3024282, 10359274, 37010151, 138333876, 524680726, 1964881580, 7214899381, 26104002605, 93449335588, 331875353107, 1177784053061, 4229817098432, 15554800422055

Offset

1,1

Comments

Column 3 of A254539

Links

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

Example

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

Crossrefs

Sequence in context: A336417 A232208 A294502 * A071727 A148354 A364330

Adjacent sequences: A254531 A254532 A254533 * A254535 A254536 A254537

Keyword

nonn

Author

R. H. Hardin, Feb 01 2015

Status

approved