login
Beginning with 2, a(n+1) is the smallest palindromic prime obtained by placing identical digits on both sides of a(n).
1

%I #4 Dec 05 2013 19:56:37

%S 2,727,37273,333727333,93337273339,779333727333977,

%T 3377933372733397733,9993377933372733397733999,

%U 111111199933779333727333977339991111111,31111111999337793337273339773399911111113

%N Beginning with 2, a(n+1) is the smallest palindromic prime obtained by placing identical digits on both sides of a(n).

%C The next term is probably 777777333111111199933779333727333977339991111111333777777. - _Sam Alexander_, Jan 06 2005

%Y Cf. A090276.

%K base,nonn

%O 0,1

%A _Amarnath Murthy_, Nov 28 2003

%E More terms from _Sam Alexander_, Jan 06 2005