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 A115703 #2 Mar 30 2012 17:40:35 %S A115703 12,22,51,210,330,425,1162,2882,3876,4510,6902,8400,9801,14652,15251, %T A115703 22632,27270,29330,32340,52360,54055,55777,58707,66676,68587,104412, %U A115703 197472,217551,279720,298151,319935,341055,448540,468442,481950 %N A115703 Pentagonal numbers (A000326) whose digit reversal is the product of 2 palindromes greater than 1. %e A115703 14652 is the 99th pentagonal number and 25641=77*333. %Y A115703 Cf. A000326, A115683. %K A115703 nonn,base %O A115703 1,1 %A A115703 _Giovanni Resta_, Jan 31 2006