OFFSET
1,1
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..78 (calculated using the b-file at A033844; terms 1..57 from Hugo Pfoertner)
FORMULA
a(n) = A181363(2^n - 1). - Reinhard Zumkeller, Oct 16 2010
MATHEMATICA
Prime[2^Range[34] - 1] (* Vladimir Joseph Stephan Orlovsky, Jul 19 2011 *)
PROG
(PARI) a(n)=prime(2^n-1) \\ Charles R Greathouse IV, Sep 28 2015
CROSSREFS
KEYWORD
nonn
AUTHOR
EXTENSIONS
More terms from Michael Lugo (mlugo(AT)thelabelguy.com), Dec 22 1999
STATUS
approved