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%I #12 Sep 17 2023 01:29:40
%S 101,113,127,131,149,151,163,173,181,191,1103,1117,1123,2131,2141,
%T 1151,1163,1171,1181,1193,1201,1213,1223,1231,1249,1259,2267,1277,
%U 1283,1291,1301,1319,1321,2333,2341,2351,1361,1373,1381,1399,1409,2411,1423,1433
%N Smallest prime with internal digits = n; or 0 if no such number exists.
%C By placing one digit on both sides of n one get 36 different numbers that might be primes ( 1 to 9 on left and 1,3,7,9 on right). If none of these numbers is a prime then a(n) = 0.
%C The smallest value of n for which a(n) = 0 is 2437 = A032734(0). - _Rick L. Shepherd_ and _Reinhard Zumkeller_, Jul 17 2002
%H Robert Price, <a href="/A069691/b069691.txt">Table of n, a(n) for n = 0..10000</a>
%H <a href="/index/Pri#piden">Index entries for primes involving decimal expansion of n</a>
%e a(25) = 1259 is prime with internal digits =25.
%Y Cf. A032734.
%K nonn,base
%O 0,1
%A _Amarnath Murthy_, Apr 06 2002
%E Corrected and extended by Larry Reeves, _Rick L. Shepherd_ and _Reinhard Zumkeller_, Jul 17 2002