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A023530 Sum of exponents in prime-power factorization of p(n)*p(n-1) + 1. 1
1, 1, 4, 4, 3, 6, 3, 6, 3, 3, 6, 4, 4, 6, 3, 4, 5, 8, 5, 4, 10, 5, 3, 3, 3, 4, 6, 4, 10, 3, 7, 4, 4, 6, 5, 8, 3, 5, 4, 4, 6, 10, 5, 14, 3, 8, 5, 3, 5, 8, 3, 4, 12, 5, 3, 6, 4, 10, 5, 3, 6, 6, 7, 3, 10, 4, 7, 4, 5, 8, 3, 6, 4, 4, 5, 4, 5, 4, 5, 6 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..1000

MATHEMATICA

Join[{1}, Total[FactorInteger[#][[All, 2]]]&/@(Times@@@Partition[Prime[ Range[ 90]], 2, 1]+1)] (* Harvey P. Dale, Apr 21 2020 *)

CROSSREFS

Sequence in context: A072420 A258075 A286296 * A337365 A233581 A193628

Adjacent sequences:  A023527 A023528 A023529 * A023531 A023532 A023533

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified February 27 23:23 EST 2021. Contains 341694 sequences. (Running on oeis4.)