A131929 - OEIS

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A131929

Number of prime factors of n that are contained in decimal representation of n.

0, 1, 1, 0, 1, 0, 1, 0, 0, 0, 1, 1, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0, 1, 0, 1, 1, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0, 0, 1, 0, 1, 1, 1, 0, 1, 0, 1, 0, 0, 1, 1, 1, 1, 0, 1, 0, 1, 0, 1, 0, 0, 1, 1, 0, 1, 0, 0, 0, 1, 0, 0, 1, 1, 0, 1, 0, 1, 0, 0, 0, 1, 1, 1, 0, 1 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	COMMENTS	`a(A050695(n)) = 0; a(A131930(n)) > 0;` `a(A131931(n)) = n and a(m) <> n for m < A131931(n).`
	LINKS	`R. Zumkeller, Table of n, a(n) for n = 1..10000`
	EXAMPLE	`a(230) = a(2352) = #{2,23} = 2.`
	CROSSREFS	`Cf. A131930, A131931.` `Sequence in context: A122257 A129950 A010051 * A100821 A139689 A073070` `Adjacent sequences: A131926 A131927 A131928 * A131930 A131931 A131932`
	KEYWORD	`nonn,base`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jul 30 2007`

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Last modified February 16 02:30 EST 2012. Contains 205860 sequences.