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 A100730 #25 Aug 17 2015 17:29:56 %S A100730 126,126,1778,6510,23622,510,507842,1523526,8388606,4194302,597870, %T A100730 35791394,21691754,2046,511305630,45678505642,51539607546, %U A100730 640638112422,2748779069430,25563645345606,46912496118442,80418967640942 %N A100730 Fundamental difference of Ulam 1-additive sequence starting U(2,2n+1). %H A100730 Max Alekseyev, <a href="/A100730/b100730.txt">Table of n, a(n) for n = 2..610</a> %H A100730 M. Akeran, <a href="/A003668/a003668.pdf">On some 1-additive sequences</a> %H A100730 S. R. Finch, <a href="http://www.emis.de/journals/EM/expmath/volumes/1/1.html">Patterns in 1-additive sequences</a>, Experimental Mathematics 1 (1992), 57-63. %F A100730 a(n) = 2 * A046932(2*n+2) %Y A100730 Cf. A100729 for the period, A001857 for U(2, 3), A007300 for U(2, 5), A003668 for U(2, 7). %K A100730 nonn %O A100730 2,1 %A A100730 _Ralf Stephan_, Dec 03 2004 %E A100730 2 more terms from Balakrishnan V (balaji.iitm1(AT)gmail.com), Nov 15 2007 %E A100730 Further new terms and b-file from _Max Alekseyev_, Dec 01 2007 %E A100730 b-file extended by _Max Alekseyev_, Aug 17 2015