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A162022 Smallest prime factor of n-th odd composite integers A071904. 3
3, 3, 3, 5, 3, 3, 5, 3, 3, 7, 3, 5, 3, 3, 5, 3, 3, 7, 3, 5, 3, 7, 3, 5, 3, 3, 3, 5, 3, 7, 11, 3, 5, 3, 7, 3, 3, 11, 5, 3, 3, 5, 3, 7, 3, 13, 3, 5, 3, 3, 5, 11, 3, 3, 3, 7, 5, 3, 11, 3, 5, 7, 3, 13, 3, 3, 5, 3, 3, 5, 13, 3, 11, 3, 7, 3, 5, 3, 3, 5, 3, 3, 7, 17, 3, 5, 3, 13, 7, 3, 5, 3, 3, 11, 3, 17, 5, 3, 7, 3 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

COMMENTS

Records are for n's such that A071904(n) = squares of primes.

a(n) = A020639(A071904(n)). [Reinhard Zumkeller, Oct 10 2011]

LINKS

Reinhard Zumkeller, Table of n, a(n) for n = 1..10000

EXAMPLE

A071904(1)=9, hence a(1)=3, A071904(4)=25, hence a(4)=5.

CROSSREFS

Cf. A014076, A071904.

Sequence in context: A049613 A002373 A103153 * A096918 A075018 A125958

Adjacent sequences:  A162019 A162020 A162021 * A162023 A162024 A162025

KEYWORD

nonn

AUTHOR

Zak Seidov (zakseidov(AT)yahoo.com), Jun 25 2009

EXTENSIONS

Corrected example a(4)=5 Francesco Antoni (francesco_antoni(AT)yahoo.com), Aug 04 2010

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Last modified February 14 11:36 EST 2012. Contains 205623 sequences.