id:A090814 - OEIS Search Results

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

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11, 1093, 3851, 797161, 64570081, 581130733, 1001523179, 581613367499, 308836698141973, 225141952945498681, 219716845645607147, 164128483697268538813, 13294407179478751643893, 90575914334953364003723 (list; graph; listen)

	OFFSET	`3,1`
	COMMENT	`Appears to be an integer for n from 3 up to 250.`
	PROGRAM	`(PARI) a(n)=3(3^prime(n)-1)/denominator(bernfrac(2prime(n)))`
	CROSSREFS	`Adjacent sequences: A090811 A090812 A090813 this_sequence A090815 A090816 A090817` `Sequence in context: A046187 A004811 A126197 this_sequence A109217 A109227 A133342`
	KEYWORD	`nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Feb 11 2004`

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Last modified October 13 09:05 EDT 2008. Contains 145008 sequences.

AT&T Labs Research