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 A051825 #4 Jun 11 2014 17:24:23
%S A051825 1,8,66,488,3360,23132,165550,1262132,10302943,88755142,788594730,
%T A051825 7086051536,63890207069,581627969769,5421588729745,52259542704256
%N A051825 Number of numbers below 10^n with nonzero multiplicative digital root 5.
%D A051825 William Mayne, sci.math, Jun 15 1991
%F A051825 # { i : 10^(n-1) < i < 10^n and A051802(i)=5 }
%Y A051825 Cf. A051802, A051807, A051816.
%K A051825 nonn,base,hard
%O A051825 1,2
%A A051825 _Dan Hoey_, Dec 09 1999