OFFSET
1,1
COMMENTS
a(17) > 4*10^9. - Giovanni Resta, Nov 06 2012
EXAMPLE
a(4) = 11, 11^3 -1 = 2*5*7*19.
CROSSREFS
KEYWORD
more,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) from Giovanni Resta, Nov 06 2012
STATUS
approved