id:A137721 - OEIS Search Results

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Number of numbers not greater than n with no prime gaps in their factorization.

+0
5

1, 2, 3, 4, 5, 6, 7, 8, 9, 9, 10, 11, 12, 12, 13, 14, 15, 16, 17, 17, 17, 17, 18, 19, 20, 20, 21, 21, 22, 23, 24, 25, 25, 25, 26, 27, 28, 28, 28, 28, 29, 29, 30, 30, 31, 31, 32, 33, 34, 34, 34, 34, 35, 36, 36, 36, 36, 36, 37, 38, 39, 39, 39, 40, 40, 40, 41, 41, 41, 41, 42, 43, 44 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`a(n) > a(n-1) iff A073490(n) = 0;` `a(n) > A137722(n) for n < 134;` `a(n) < A137722(n) for n > 140;` `a(A137723(n) + n) = a(A137723(n)) + 1.` `Partial sums of A137794. - Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Feb 11 2008`
	LINKS	`R. Zumkeller, Table of n, a(n) for n = 1..1000`
	FORMULA	`a(n) = Sum(0^A073490(k): 1<=k<=n).`
	CROSSREFS	`Cf. A073491.` `Sequence in context: A100637 A081063 A081304 this_sequence A028904 A081600 A017884` `Adjacent sequences: A137718 A137719 A137720 this_sequence A137722 A137723 A137724`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Feb 09 2008`

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Last modified July 26 13:41 EDT 2008. Contains 142293 sequences.

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