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 A185671 #6 Jul 02 2017 12:22:19 %S A185671 3,5861,58573,3916021,284728111,1910245261 %N A185671 Final prime of first member of A019518 that is divisible by 23^n. %e A185671 While the very first concatenation is divisible by 23, 23^2 does not divide any such number until 5861 is adjoined. %Y A185671 Cf. A183194, A185656, and those following. %K A185671 nonn,base,more %O A185671 1,1 %A A185671 _James G. Merickel_, Feb 01 2011