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A113936
a(n) = k-th prime, where k = n-th Mersenne prime = A000668(n).
0
5, 17, 127, 709, 84011, 1742527, 7754017, 50685770143
OFFSET
1,1
FORMULA
a(n) = A000040(A000668(n)). [From Omar E. Pol, Dec 09 2009]
MATHEMATICA
Prime[2^{2, 3, 5, 7, 13, 17, 19, 31} - 1] (* Robert G. Wilson v *)
PROG
(PARI) prime(2^13-1) prime(2^7-1) prime(2^5-1) prime(2^3-1) prime(2^2-1)
CROSSREFS
Sequence in context: A202038 A012259 A256459 * A365295 A012263 A076448
KEYWORD
hard,nonn
AUTHOR
Jorge Coveiro, Jan 31 2006
EXTENSIONS
a(6)-a(8) from Robert G. Wilson v and Stefan Steinerberger, Jan 31 2006
A-number in definition corrected by Omar E. Pol, Dec 09 2009
STATUS
approved