OFFSET
1,1
COMMENTS
EXAMPLE
T(2)=253, 3253 is prime, so 22 is a term;
T(46)=1081, 31081 is prime, so 46 is a term;
T(61)=1891, 31891 is prime, so 61 is a term.
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Zak Seidov, Mar 28 2009
STATUS
approved