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 A115698 #2 Mar 30 2012 17:40:35 %S A115698 4,6,9,21,22,33,46,51,55,65,77,82,94,121,202,203,253,262,303,393,407, %T A115698 427,445,446,451,485,505,559,583,626,667,669,671,687,707,789,803,849, %U A115698 869,889,939,1042,1111,1441,1622,1661,1991,2031,2123,2157,2173,2321 %N A115698 Semiprimes (A001358) whose digit reversal is the product of 2 palindromes greater than 1. %e A115698 669=3*223 is semiprime and 966=6*161. %Y A115698 Cf. A001358, A115683. %K A115698 nonn,base %O A115698 1,1 %A A115698 _Giovanni Resta_, Jan 31 2006