%I A052507
%S A052507 0,0,0,0,0,0,18,180,180,0,630,630,720,720,18,18,0,36,360,360,0,450,450,
%T A052507 180,180,90,90,180,180,720,72,72,0,198,702,1998,17010,17010,39600,900,
%U A052507 900,540,5400,44100,900,900,18,180,180,0,180,1800,9900,17100,17100
%N A052507 Take n-th palindromic prime p, let P = all primes having same digits; 
               a(n) = q-p where q is smallest prime in P >p if q exists; otherwise 
               a(n) = p-r where r is largest prime in P <p if r exists; otherwise 
               a(n) = 0.
%C A052507 The primes in P are required to have the same number of digits as p; 
               thus internal 0's must remain internal 0's.
%e A052507 a(8)=180 because the distance from 131 to 311 is 180.
%Y A052507 Cf. A052495, A052480.
%Y A052507 Sequence in context: A010970 A126920 A022583 this_sequence A071910 A121038 
               A004410
%Y A052507 Adjacent sequences: A052504 A052505 A052506 this_sequence A052508 A052509 
               A052510
%K A052507 base,easy,nonn
%O A052507 1,7
%A A052507 Enoch Haga (Enokh(AT)comcast.net), Mar 17 2000