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 A106746 #10 Jan 23 2018 04:59:40
%S A106746 5,5,6,6,7,7,8,8,9,9,55,55,56,56,57,57,58,58,59,59,65,65,66,66,67,67,
%T A106746 68,68,69,69,65,65,66,66,67,67,68,68,69,69,75,75,76,76,77,77,78,78,79,
%U A106746 79,75,75,76,76,77,77,78,78,79,79,85,85,86,86,87,87,88,88,89,89,85,85,86
%N A106746 Replace each digit d of n with floor(d/2) + 5.
%H A106746 Vincenzo Librandi, <a href="/A106746/b106746.txt">Table of n, a(n) for n = 0..5000</a>
%t A106746 a[n_]:=FromDigits[Map[Floor[ #/2]+5&, IntegerDigits[n]]];Table[a[n], {n, 0, 100}]
%K A106746 nonn,base
%O A106746 0,1
%A A106746 _Zak Seidov_, May 12 2005