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 A051819 #4 Jun 11 2014 17:24:22
%S A051819 1,23,228,2536,29135,320182,3348887,33918043,337681353,3346457531,
%T A051819 33328331754,335156871449,3402031164396,34729171765901,
%U A051819 354926411492071,3618033042193311
%N A051819 Number of n-digit numbers with nonzero multiplicative digital root 8.
%D A051819 William Mayne, sci.math, Jun 15 1991
%F A051819 # { i : 10^(n-1) < i < 10^n and A051802(i)=8 }
%Y A051819 Cf. A051802, A051810, A051828.
%K A051819 nonn,base,hard
%O A051819 1,2
%A A051819 _Dan Hoey_, Dec 09 1999