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A087040 2nd largest prime factor of n-th composite number. 2
2, 2, 2, 3, 2, 2, 2, 3, 2, 3, 2, 3, 2, 2, 5, 2, 3, 2, 3, 2, 3, 2, 5, 3, 2, 3, 2, 3, 2, 3, 2, 2, 7, 5, 3, 2, 3, 5, 2, 3, 2, 3, 2, 3, 2, 5, 3, 2, 3, 5, 3, 2, 5, 2, 7, 3, 2, 3, 2, 3, 5, 2, 3, 2, 3, 7, 2, 3, 2, 5, 2, 7, 3, 5, 3, 2, 5, 2, 3, 5, 3, 2, 3, 5, 2, 3, 2, 7, 3, 11, 2, 3, 2, 5, 3, 2, 3, 5, 3, 7, 2, 3 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

a(n) = A087039(A002808(n));

a(n) = A006530(A002808(n)/A052369(n)).

LINKS

Table of n, a(n) for n=1..102.

CROSSREFS

Sequence in context: A270776 A056608 A091787 * A065569 A262941 A127656

Adjacent sequences:  A087037 A087038 A087039 * A087041 A087042 A087043

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Aug 01 2003

STATUS

approved

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Last modified May 21 00:36 EDT 2022. Contains 353886 sequences. (Running on oeis4.)