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%I #6 Sep 30 2013 17:02:21
%S 2,30,810,300,300,3000,3000,3000,3000,3000,8100,3000,3000,3000,81000,
%T 30000,30000,30000,81000,111000,30000,30000,30000,30000,81000,111000,
%U 30000,30000,30000,81000,111000,30000,30000,30000,111000,30000,141000,81000,81000
%N Common difference in sets of 3 consecutive palindromic primes (palprimes) in arithmetic progression.
%e a(2)=30 since (727, 757, 787) is the second arithmetic progression of 3 consecutive palindromic primes with common difference = 30.
%Y Cf. A059120.
%K nonn,base
%O 1,1
%A _Shyam Sunder Gupta_, Sep 29 2013
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