id:A131929 - OEIS Search Results

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A131929

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

+0
4

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; listen)

	OFFSET	`1,1`
	COMMENT	`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.` `Adjacent sequences: A131926 A131927 A131928 this_sequence A131930 A131931 A131932` `Sequence in context: A122257 A129950 A010051 this_sequence A100821 A073070 A099104`
	KEYWORD	`nonn,base`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jul 30 2007`

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Last modified May 16 01:24 EDT 2008. Contains 139630 sequences.

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