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A254542 Number of length 4 1..(n+2) arrays with no leading partial sum equal to a prime 1
2, 20, 45, 160, 222, 576, 1026, 1849, 2461, 4195, 5217, 8052, 11098, 15300, 18210, 25269, 29296, 38791, 48468, 60634, 68591, 87149, 104149, 126729, 149195, 177607, 196492, 236417, 258581, 301770, 345756, 398586, 452724, 522973, 563863, 640216 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 4 of A254539

LINKS

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

EXAMPLE

Some solutions for n=4

..6....6....4....4....1....1....4....6....6....4....6....6....6....4....1....6

..2....2....4....5....3....3....6....4....6....2....2....3....2....5....5....2

..4....6....6....3....4....2....4....2....3....4....4....3....1....3....3....6

..2....1....1....2....1....4....6....4....3....2....6....2....6....4....6....4

CROSSREFS

Sequence in context: A194999 A280436 A266842 * A202602 A097652 A261838

Adjacent sequences:  A254539 A254540 A254541 * A254543 A254544 A254545

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 01 2015

STATUS

approved

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Last modified December 16 01:32 EST 2019. Contains 330013 sequences. (Running on oeis4.)