OFFSET
1,1
COMMENTS
p=prime such that p is substring of 2^p-1 in A086110.
EXAMPLE
a(2)=12 because prime(12)=37 is substring of 2^37-1=137438953471.
CROSSREFS
KEYWORD
easy,nonn,base
AUTHOR
Zak Seidov, Jul 10 2003
STATUS
approved