id:A078837 - OEIS Search Results

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a(n)=sum(k=1,p(n)-1, floor(k^3/p(n))) where p(n) denotes the n-th prime.

+0
3

0, 2, 18, 60, 270, 462, 1080, 1530, 2772, 5670, 6960, 11970, 16380, 18942, 24840, 35802, 49590, 54870, 72930, 86940, 94572, 120120, 139482, 172260, 223440, 252450, 267852, 300510, 317790, 354312, 504000, 553410, 633420, 661710, 815850 (list; graph; listen)

	OFFSET	`1,2`
	LINKS	`E. M. Weisstein, Prime sums`
	FORMULA	`a(n)= (1/4)(prime(n)-2)(prime(n)-1)*(prime(n)+1)`
	CROSSREFS	`Sequence in context: A114109 A085293 A119118 this_sequence A112365 A034959 A073976` `Adjacent sequences: A078834 A078835 A078836 this_sequence A078838 A078839 A078840`
	KEYWORD	`nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Dec 08 2002`

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.

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