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A088288 Palindromic primes made of only two digits say a and b such that replacing a with b and vice versa one gets another prime. 0

%I #7 Mar 31 2017 21:35:50

%S 131,191,313,919,113111311,131333131,313111313,331333133,11199199111,

%T 99911911999,1111191911111,9999919199999,133131131131331,

%U 311313313313113,777997999799777,999779777977999,11177771717777111

%N Palindromic primes made of only two digits say a and b such that replacing a with b and vice versa one gets another prime.

%C Conjecture: Sequence is finite.

%e 131 and 313 are both members. 313 is obtained by replacing a 3 with a 1 and a 1 with a 3.

%K base,nonn

%O 1,1

%A _Amarnath Murthy_, Sep 29 2003

%E More terms from _David Wasserman_, Aug 04 2005

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Last modified February 22 14:47 EST 2024. Contains 370256 sequences. (Running on oeis4.)