id:A072980 - OEIS Search Results

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Numerator of b(n)=sum (k'<=n,1/k') where k' denotes the squarefree numbers.

+0
2

1, 3, 11, 11, 61, 11, 82, 82, 82, 171, 1951, 1951, 26133, 13424, 41273, 41273, 716656, 716656, 13871719, 13871719, 4700888, 9548741, 222854273, 222854273, 222854273, 112857219, 112857219, 112857219, 3310041496, 20075905417 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`b(n) was used by Niven in the 70's for an alternative proof of the divergence of the sum of reciprocal of primes.`
	CROSSREFS	`Cf. A072983.` `Sequence in context: A038229 A080351 A059200 this_sequence A128500 A043051 A024545` `Adjacent sequences: A072977 A072978 A072979 this_sequence A072981 A072982 A072983`
	KEYWORD	`easy,frac,nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Aug 21 2002`

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Last modified November 27 14:50 EST 2009. Contains 167570 sequences.

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