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A023518
Greatest exponent in prime-power factorization of prime(n)*prime(n-1) - 1.
1
0, 1, 1, 1, 2, 1, 2, 1, 2, 2, 1, 1, 2, 1, 2, 1, 1, 1, 2, 2, 1, 2, 2, 1, 3, 2, 1, 2, 3, 2, 2, 2, 2, 1, 1, 1, 3, 1, 2, 3, 1, 1, 1, 1, 2, 1, 2, 2, 2, 1, 2, 1, 1, 1, 1, 2, 1, 1, 1, 2, 1, 1, 2, 2, 1, 2, 1, 2, 1, 1, 2, 1, 3, 4, 1, 2, 3, 6, 2, 3
OFFSET
1,5
LINKS
MATHEMATICA
Join[{0}, Max[Transpose[FactorInteger[#]][[2]]]&/@(Times@@@Partition[ Prime[ Range[80]], 2, 1]-1)] (* Harvey P. Dale, Jun 19 2013 *)
CROSSREFS
Sequence in context: A023582 A306717 A195969 * A326194 A331251 A309858
KEYWORD
nonn
STATUS
approved