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%I #7 Dec 27 2013 19:13:29
%S 4,-1,-2,-4,-8,-16,-32,-64,-128,-256,-512,-1024,-2048,-4096,-8192,
%T -16384,-32768,-65536
%N a(n)=A154570(n)+A154570(n+1).
%F G.f.: (4-9x)/(1-2x). a(n+1)= -A000079(n). _R. J. Mathar_, Feb 25 2009
%F E.g.f.: 5 + x/(G(0)+1), where G(k) = 2*k - 1 - x/(1 + x/G(k+1) ); (continued fraction ). - _Sergei N. Gladkovskii_, Dec 27 2013
%K sign,easy
%O 0,1
%A _Paul Curtz_, Jan 12 2009
%E Edited by _N. J. A. Sloane_, Jan 14 2009
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