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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
OFFSET
1,1
COMMENTS
Column 2 of A254539
LINKS
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: A092031 A082914 A333680 * A095341 A167123 A029895
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 01 2015
STATUS
approved