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