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A092132 Indices k of Bernoulli numbers B(k) whose numerators are primes. 5
10, 12, 14, 16, 18, 36, 42 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

No others with k <= 22100. - Eric W. Weisstein, Mar 01 2004

a(8) > 50000. - Robert Price, Oct 20 2013

LINKS

Table of n, a(n) for n=1..7.

Eric Weisstein's World of Mathematics, Bernoulli Number

Eric Weisstein's World of Mathematics, Integer Sequence Primes

MATHEMATICA

Reap[For[n = 1, n <= 1000, n++, If[ PrimeQ[ Numerator[ BernoulliB[n]]], Print[n]; Sow[n]]]][[2, 1]] (* Jean-Fran├žois Alcover, Oct 31 2012 *)

Select[Range[50], PrimeQ[Numerator[BernoulliB[#]]]&] (* Harvey P. Dale, Sep 30 2019 *)

CROSSREFS

Cf. A092133.

Sequence in context: A227870 A007958 A179083 * A088170 A329522 A189555

Adjacent sequences:  A092129 A092130 A092131 * A092133 A092134 A092135

KEYWORD

nonn,more

AUTHOR

Eric W. Weisstein, Feb 23 2004

STATUS

approved

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Last modified May 19 23:13 EDT 2022. Contains 353847 sequences. (Running on oeis4.)