%I A101954
%S A101954 35,182,329,392
%N A101954 Indices of primes in sequence defined by A(0) = 27, A(n) = 10*A(n-1) 
               - 53 for n > 0.
%C A101954 Numbers n such that (190*10^n + 53)/9 is prime.
%C A101954 Numbers n such that digit 2 followed by n >= 0 occurrences of digit 1 
               followed by digit 7 is prime.
%C A101954 Numbers corresponding to terms <= 392 are certified primes.
%D A101954 Klaus Brockhaus and Walter Oberschelp, Zahlenfolgen mit homogenem Ziffernkern, 
               MNU 59/8 (2006), pp. 462-467.
%e A101954 2111111111111111111111111111111111117 is prime, hence 35 is a term.
%o A101954 (PARI) a=27;for(n=0,1500,if(isprime(a),print1(n,","));a=10*a-53)
%o A101954 (PARI) for(n=0,1500,if(isprime((190*10^n+53)/9),print1(n,",")))
%Y A101954 Cf. A000533, A002275.
%Y A101954 a(n) = A102949(n) - 1.
%Y A101954 Sequence in context: A154074 A015219 A033851 this_sequence A005937 A007329 
               A101628
%Y A101954 Adjacent sequences: A101951 A101952 A101953 this_sequence A101955 A101956 
               A101957
%K A101954 nonn,hard,more
%O A101954 1,1
%A A101954 Klaus Brockhaus (klaus-brockhaus(AT)t-online.de) and Walter Oberschelp 
               (oberschelp(AT)informatik.rwth-aachen.de), Dec 23 2004