id:A126761 - OEIS Search Results

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{a(k)} is such that, for every positive integer n, the n-th prime = sum{1<=k<=n,GCD(k,n+1)=1} a(k).

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2, 1, 3, 1, 9, -3, 3, 3, 15, -5, 17 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`31 is the 11th prime. So 31 = sum{1<=k<=11,GCD(k,12)=1} a(k) = a(1)+a(5)+a(7)+a(11) = 2 +9 +3 +17.`
	CROSSREFS	`Sequence in context: A058036 A136179 A090559 this_sequence A098570 A122048 A046208` `Adjacent sequences: A126758 A126759 A126760 this_sequence A126762 A126763 A126764`
	KEYWORD	`more,sign`
	AUTHOR	`Leroy Quet (qq-quet(AT)mindspring.com), Feb 22 2007`

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Last modified July 26 23:19 EDT 2008. Contains 142293 sequences.