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 A046454 #7 Oct 27 2019 00:32:39 %S A046454 32,243,3125,16807,19875,38955,51909,75117,85683,94605,96195,158389, %T A046454 161051,182427,185493,205905,261443,261555,320385,323253,397047, %U A046454 439593,451209,504357,507969,584647,613977,617799,718977,719955,795417,839523 %N A046454 Concatenation of the 5 prime factors of composite a(n) is a palindrome. %e A046454 320385 = 3 * 5 * 13 * 31 * 53 -> 35133153 is palindromic. %Y A046454 Cf. A046447. %K A046454 nonn,base %O A046454 0,1 %A A046454 _Patrick De Geest_, Jul 15 1998