A090817 - OEIS

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A090817

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

1, 1, 5, 7, 854513, 8553103, 2577687858367, 2929993913841559, 596451111593912163277961, 84483613348880041862046775994036021, 12300585434086858541953039857403386151

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OFFSET

1,3

COMMENTS

a(1)=1 (instead of -1)

LINKS

Table of n, a(n) for n=1..11.

PROG

(PARI) a(n)=numerator(bernfrac(2*prime(n)))

CROSSREFS

Sequence in context: A291687 A257774 A281386 * A357054 A198875 A249403

Adjacent sequences: A090814 A090815 A090816 * A090818 A090819 A090820

KEYWORD

nonn

AUTHOR

Benoit Cloitre, Feb 11 2004

STATUS

approved