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 A023522 Sum of exponents in prime-power factorization of p(n)*p(n-1) - 1. 1
 1, 2, 2, 3, 2, 4, 3, 3, 4, 2, 3, 3, 2, 4, 4, 3, 3, 4, 4, 2, 4, 4, 3, 5, 4, 3, 5, 5, 3, 5, 3, 4, 2, 4, 3, 5, 4, 4, 6, 4, 3, 3, 3, 4, 3, 4, 5, 4, 4, 3, 3, 3, 4, 4, 5, 4, 4, 3, 5, 2, 3, 5, 3, 4, 6, 3, 4, 3, 3, 4, 3, 5, 8, 3, 4, 6, 8, 3, 6 (list; graph; refs; listen; history; text; internal format)
 OFFSET 2,2 LINKS Harvey P. Dale, Table of n, a(n) for n = 2..1000 FORMULA a(n) = A001222(A023515(n)). - Michel Marcus, Sep 30 2013 MATHEMATICA PrimeOmega[Times@@#-1]&/@Partition[Prime[Range[80]], 2, 1] (* Harvey P. Dale, Nov 22 2014 *) PROG (PARI) a(n) = bigomega(prime(n)*prime(n-1) - 1); \\ Michel Marcus, Sep 30 2013 CROSSREFS Sequence in context: A297113 A086375 A107324 * A205000 A066241 A060025 Adjacent sequences:  A023519 A023520 A023521 * A023523 A023524 A023525 KEYWORD nonn AUTHOR EXTENSIONS Offset set to 2 and a(1) removed by Michel Marcus, Sep 30 2013 STATUS approved

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Last modified October 17 14:25 EDT 2018. Contains 316281 sequences. (Running on oeis4.)