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 A048842 #9 Aug 28 2016 18:23:39
%S A048842 1,13,26,39,52,65,78,91,104,117,130,143,156,169,169,182,195,208,221,
%T A048842 234,247,260,273,286,299,312,325,338,338,351,364,377,390,403,416,429,
%U A048842 442,455,468,481,494,507,507,520,533,546,559,572,585,598
%N A048842 Least positive integer k for which 13^n divides k!.
%H A048842 T. D. Noe, <a href="/A048842/b048842.txt">Table of n, a(n) for n = 0..1000</a>
%o A048842 (PARI) a(n) = {k = 1; ok = 0; until (ok, if (k! % 13^n == 0, ok=1, k++);); return (k);} \\ _Michel Marcus_, Jun 30 2013
%Y A048842 See A007843 for more information.
%K A048842 nonn
%O A048842 0,2
%A A048842 Charles T. Le (charlestle(AT)yahoo.com)