%I #9 Aug 09 2017 23:01:27

%S 29,0,59,79,11119,139,179,199,239,29292929292929299,31319,379,419,439,

%T 479,0,599,619,67679,719,739,797979799,839,89899,979797979,1019,1039,

%U 1071071071079,1091091091099,1131139,1279,1319,1371371371379,1399,1499

%N Smallest prime of the form concatenation of prime(n) with itself followed by a 9, or 0 if no such prime exists.

%C a(16)=0 since the concatenation of 53 with itself, followed by a 9, is always composite. a(36), if it exists, has more than 12000 digits. - _Giovanni Resta_, Apr 07 2006

%Y Cf. A092992, A092993, A092994.

%K base,nonn

%O 1,1

%A _Amarnath Murthy_, Mar 28 2004

%E More terms from _Sam Alexander_, Jan 09 2005

%E More terms from _Giovanni Resta_, Apr 07 2006