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 A115702 #2 Mar 30 2012 17:40:35 %S A115702 6,21,36,45,55,66,120,210,231,253,406,465,561,630,666,820,990,3003, %T A115702 3240,4095,4950,5050,5151,5671,5995,6670,8001,20503,23653,24753,29403, %U A115702 31125,33153,37950,41041,43956,54615,57630,60726,63546,66066,73920 %N A115702 Triangular numbers whose digit reversal is the product of 2 palindromes greater than 1. %e A115702 8001=T(126) and 1008=4*252. %Y A115702 Cf. A115683. %K A115702 nonn,base %O A115702 1,1 %A A115702 _Giovanni Resta_, Jan 31 2006