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 A075687 #7 Jul 11 2015 00:41:45 %S A075687 0,1,2,3,4,5,16,17,29,35,37,38,79,80,107 %N A075687 In base 4, records for the number of Reverse and Add! steps needed to reach a palindrome. %C A075687 RECORDS transform of A075685. Base-4 analog of A065199 (base 10) and A066145 (base 2). A075686 gives the corresponding starting points. %H A075687 N. J. A. Sloane, <a href="/transforms.txt">Transforms</a> %H A075687 <a href="/index/Res#RAA">Index entries for sequences related to Reverse and Add!</a> %e A075687 Starting with 26, 3 Reverse and Add! steps are needed to reach a palindrome; starting with n < 26, less (at most 2) steps are needed. %Y A075687 Cf. A065199, A066145, A075685, A075686. %K A075687 base,more,nonn %O A075687 0,3 %A A075687 _Klaus Brockhaus_, Sep 24 2002