id:A039995 - OEIS Search Results

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Number of distinct primes which occur as subsequences of the sequence of digits of n.

+0
5

0, 1, 1, 0, 1, 0, 1, 0, 0, 0, 1, 1, 2, 0, 1, 0, 2, 0, 1, 1, 1, 1, 3, 1, 2, 1, 2, 1, 2, 1, 2, 2, 1, 1, 2, 1, 3, 1, 1, 0, 1, 1, 2, 0, 1, 0, 2, 0, 0, 1, 1, 2, 3, 1, 1, 1, 2, 1, 2, 0, 1, 1, 1, 0, 1, 0, 2, 0, 0, 1, 2, 2, 3, 1, 2, 1, 1, 1, 2, 0, 0, 1, 2, 0, 1, 0, 1, 0, 1, 0, 0, 1, 1, 0, 1, 0, 2, 0, 0, 0, 2, 1, 3, 0, 1 (list; graph; listen)

	OFFSET	`1,13`
	COMMENT	`a(n) counts subsequences of digits of n which denote primes.`
	EXAMPLE	`a(103)=3; the 3 primes are 3, 13 and 103.`
	CROSSREFS	`A039997 counts only the primes which occur as substrings, i.e. contiguous subsequences. Cf. A035232.` `Sequence in context: A147648 A113686 A039997 this_sequence A035232 A091603 A129688` `Adjacent sequences: A039992 A039993 A039994 this_sequence A039996 A039997 A039998`
	KEYWORD	`nonn,base`
	AUTHOR	`Dave Wilson`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

AT&T Labs Research