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A139287
2^(2p - 1) - 1, where p is prime.
10
7, 31, 511, 8191, 2097151, 33554431, 8589934591, 137438953471, 35184372088831, 144115188075855871, 2305843009213693951, 9444732965739290427391, 2417851639229258349412351, 38685626227668133590597631
OFFSET
1,1
LINKS
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
KEYWORD
nonn,easy
AUTHOR
Omar E. Pol, Apr 13 2008
EXTENSIONS
a(9) corrected by Vincenzo Librandi, May 24 2014
STATUS
approved