OFFSET
1,2
COMMENTS
3 divides a(n) for n > 1.
MATHEMATICA
Select[Range[5*10^6], Mod[ 11^(#^2)+1, #^3]==0 &] (* G. C. Greubel, Jan 18 2018 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Alexander Adamchuk, Mar 31 2007
EXTENSIONS
a(5) from J. Mulder (jasper.mulder(AT)planet.nl), Jan 26 2010
Terms from a(6) onward from Max Alekseyev, May 14 2010
STATUS
approved