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A023507 Sum of distinct prime divisors of p(n) - 1. 0
0, 2, 2, 5, 7, 5, 2, 5, 13, 9, 10, 5, 7, 12, 25, 15, 31, 10, 16, 14, 5, 18, 43, 13, 5, 7, 22, 55, 5, 9, 12, 20, 19, 28, 39, 10, 18, 5, 85, 45, 91, 10, 26, 5, 9, 16, 17, 42, 115, 24, 31, 26, 10, 7, 2, 133, 69, 10, 28, 14, 52, 75, 22, 38, 18, 81, 21, 12, 175, 34, 13, 181 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

MATHEMATICA

Array[Plus@@First/@FactorInteger[Prime[ # ]-1]&, 5! ] [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Feb 28 2010]

CROSSREFS

Sequence in context: A205674 A021447 A136536 * A095674 A058123 A035586

Adjacent sequences:  A023504 A023505 A023506 * A023508 A023509 A023510

KEYWORD

nonn

AUTHOR

Clark Kimberling (ck6(AT)evansville.edu)

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Last modified February 17 00:09 EST 2012. Contains 205978 sequences.