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Indices n of prime palindromic numbers formed by taking n digits in the decimal expansion of Pi and reflecting about the last digit.
3

%I #8 Aug 15 2015 14:50:23

%S 1,2,27,151,461,2056

%N Indices n of prime palindromic numbers formed by taking n digits in the decimal expansion of Pi and reflecting about the last digit.

%C The primes corresponding to these indices are A039954

%e Of 3, 313, 31413, 3141413, 314151413, the first and second are primes, so the first two terms are 1 and 2.

%Y Cf. A039954.

%K nonn,more,base

%O 1,2

%A _Eric W. Weisstein_, May 15 2006; corrected May 27 2006