A162022 - OEIS

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A162022

Smallest prime factor of n-th odd composite integers A071904.

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.