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A254533 Number of length n 1..(2+2) arrays with no leading partial sum equal to a prime 1
2, 3, 8, 20, 50, 126, 329, 956, 2897, 8341, 23238, 66544, 194686, 555838, 1532445, 4225095, 12140873, 36623429, 112964359, 345148105, 1027400959, 2988415841, 8604041257, 24715209608, 70743541258, 201532200098, 575286723544 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A254539

LINKS

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

EXAMPLE

Some solutions for n=4

..4....1....4....4....4....4....4....4....1....1....1....1....4....4....4....1

..2....3....4....4....2....4....4....2....3....3....3....3....2....2....4....3

..3....4....1....4....2....4....2....4....4....2....2....4....2....2....1....2

..3....1....3....3....2....2....4....4....4....4....3....2....4....1....1....2

CROSSREFS

Sequence in context: A247568 A092031 A082914 * A095341 A167123 A029895

Adjacent sequences:  A254530 A254531 A254532 * A254534 A254535 A254536

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 01 2015

STATUS

approved

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Last modified November 16 06:50 EST 2018. Contains 317258 sequences. (Running on oeis4.)