OFFSET
1,1
EXAMPLE
a(4) = 1331 = 11^3 = 2*5*7*19 + 1.
CROSSREFS
KEYWORD
nonn
AUTHOR
Amarnath Murthy, Sep 19 2003
EXTENSIONS
More terms from Ray Chandler, Oct 04 2003
2 more terms from Lambert Herrgesell (zero815(AT)googlemail.com), Feb 20 2008
a(14)-a(16) derived from A088030 by Michel Marcus, Feb 05 2014
STATUS
approved