id:A137722 - OEIS Search Results

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Number of numbers not greater than n with exactly one prime gap in their factorization.

+0
3

0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 3, 4, 5, 5, 5, 5, 6, 6, 7, 7, 7, 7, 7, 8, 9, 9, 9, 9, 10, 11, 12, 12, 13, 13, 14, 14, 15, 15, 15, 15, 16, 17, 18, 18, 18, 19, 20, 21, 22, 22, 22, 22, 23, 24, 24, 25, 26, 26, 27, 28, 29, 29, 29, 29, 30, 30, 31, 31, 32, 32, 33, 33, 34 (list; graph; listen)

	OFFSET	`1,14`
	COMMENT	`a(n) > a(n-1) iff A073490(n) = 1;` `A137721(n) > a(n) for n < 134;` `A137721(n) < a(n) for n > 140.`
	LINKS	`R. Zumkeller, Table of n, a(n) for n = 1..1000`
	CROSSREFS	`Cf. A073493.` `Sequence in context: A109701 A124751 A103374 this_sequence A081305 A035665 A027388` `Adjacent sequences: A137719 A137720 A137721 this_sequence A137723 A137724 A137725`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Feb 09 2008`

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Last modified December 3 16:57 EST 2008. Contains 151279 sequences.

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