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 A109830 #8 Nov 06 2015 02:01:38 %S A109830 11,101,131,151,191,313,353,10301,10501,11311,13331,30103,1003001, %T A109830 1123211,1201021,1221221,1303031,1311131,3001003,3103013,10000500001, %U A109830 10000900001,10002520001,10013131001,10111311101,10301110301 %N A109830 Palindromic primes with both the number of digits and the digit sum also palindromic primes. %H A109830 Chai Wah Wu, <a href="/A109830/b109830.txt">Table of n, a(n) for n = 1..1000</a> %Y A109830 Cf. A082806 = palindromes which are prime and the sum of the digits is also prime. A082806 = palindromic primes with a prime digit sum. %K A109830 base,nonn %O A109830 1,1 %A A109830 _Zak Seidov_, Jul 04 2005 %E A109830 More terms from _Joshua Zucker_, May 17 2006