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 A044712 #11 Jan 23 2017 17:18:13
%S A044712 80,161,242,323,404,485,566,647,728,809,890,971,1052,1133,1214,1295,
%T A044712 1376,1457,1538,1619,1700,1781,1862,1943,2024,2105,2186,2267,2348,
%U A044712 2429,2510,2591,2672,2753,2834,2915,2996,3077,3158
%N A044712 Numbers n such that string 8,8 occurs in the base 9 representation of n but not of n+1.
%H A044712 Tanya Khovanova, <a href="http://www.tanyakhovanova.com/RecursiveSequences/NonRecursions.html">Non Recursions</a>
%t A044712 SequencePosition[Table[If[SequenceCount[IntegerDigits[n,9],{8,8}]>0,1,0],{n,3200}],{1,0}][[All,1]] (* Requires Mathematica version 10 or later *) (* _Harvey P. Dale_, Jan 23 2017 *)
%Y A044712 Cf. A157597, A010734 [From _Vincenzo Librandi_, Mar 13 2009]
%K A044712 nonn,base
%O A044712 1,1
%A A044712 _Clark Kimberling_