A254532 Number of length n 1..(1+2) arrays with no leading partial sum equal to a prime

1, 1, 1, 2, 4, 6, 11, 20, 33, 62, 135, 317, 692, 1345, 2651, 5741, 12576, 25825, 49270, 90118, 168115, 340003, 751400, 1741713, 4057301, 9232683, 20184851, 42473752, 87925348, 183030469, 382853596, 790870128, 1597901060, 3189861839, 6430641490

Offset

1,4

Comments

Column 1 of A254539

Links

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

Example

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

Crossrefs

Sequence in context: A002097 A026757 A026385 * A199926 A068330 A017993

Adjacent sequences: A254529 A254530 A254531 * A254533 A254534 A254535

Keyword

nonn

Author

R. H. Hardin, Feb 01 2015

Status

approved