This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A230221 #7 Oct 13 2013 14:00:39 %S A230221 74747,3627263,110343011,120565021,127747721,156262651,185595581, %T A230221 185676581,304585403,309272903,317565713,317646713,329585923, %U A230221 340191043,350474053,368171863,368696863,375070573,376080673,383666383,398676893,728555827,923393329,926787629 %N A230221 Smallest of three consecutive palindromic primes with equal digital sum. %H A230221 Shyam Sunder Gupta, <a href="/A230221/b230221.txt">Table of n, a(n) for n = 1..4400</a> %e A230221 74747 is in the sequence because 74747, 75557 and 76367 are consecutive palindromic primes and the sum of the digits of each = 29. %Y A230221 Cf. A002385, A007953, A007605, A209396, A230199. %K A230221 nonn,base %O A230221 1,1 %A A230221 _Shyam Sunder Gupta_, Oct 12 2013