id:A090813 - OEIS Search Results

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a(n)=3*(3^prime(n)-1)*B(2*prime(n)) where prime(n)=n-th prime and B(k) denotes the k-th Bernoulli number.

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55, 7651, 3290729563, 6818200140583, 166441513807473717727, 1702709510836284027532747, 597359613401618666812910561358019, 49136798858325589887577115786547403314116681479 (list; graph; listen)

	OFFSET	`3,1`
	COMMENT	`Appears to be an integer value for n=3 up to 250.`
	PROGRAM	`(PARI) a(n)=3(3^prime(n)-1)bernfrac(2*prime(n))`
	CROSSREFS	`Sequence in context: A114049 A028471 A004708 this_sequence A145617 A105842 A113632` `Adjacent sequences: A090810 A090811 A090812 this_sequence A090814 A090815 A090816`
	KEYWORD	`nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Feb 11 2004`

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

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