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 A046455 #7 Oct 27 2019 00:33:56 %S A046455 64,729,15625,99375,117649,272685,525819,570999,1040655,1058145, %T A046455 1113879,1229865,1608285,1742279,1771561,2006697,2040423,2262771, %U A046455 2371551,3101259,3398759,3599775,4835523,4963299,5039685,5495301 %N A046455 Concatenation of the 6 prime factors of composite a(n) is a palindrome. %e A046455 3398759 = 7 * 13 * 13 * 13 * 13 * 17 -> 71313131317 is palindromic. %Y A046455 Cf. A046447. %K A046455 nonn,base %O A046455 1,1 %A A046455 _Patrick De Geest_, Jul 15 1998 %E A046455 Edited by _Charles R Greathouse IV_, Apr 28 2010