OFFSET
1,1
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..200
MATHEMATICA
Table[(2^(2 Prime[n] - 1) - 1), {n, 1, 20}] (* Vincenzo Librandi, May 24 2014 *)
PROG
(Magma)[2^(2*p-1)-1: p in PrimesUpTo(200)]; // Vincenzo Librandi, Dec 15 2010
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Omar E. Pol, Apr 13 2008
EXTENSIONS
a(9) corrected by Vincenzo Librandi, May 24 2014
STATUS
approved