OFFSET
1,1
FORMULA
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
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