%I

%S 3,31,311,3113197,3113197331

%N Concatenation of digits of A056129(n), starting from the first 3, that form primes.

%C The next term has 279 digits and is too large to include here.

%e A056129: 1,2,6,3,1,1,3,1,9,7,3,3,1 ........

%e 3 is prime

%e 31 is prime

%e 311 is prime

%e 3113197 is prime

%e 3113197331 is prime

%e Next one has 279 digits

%K nonn,base

%O 1,1

%A _Pierre CAMI_, Nov 21 2005