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%I #3 Mar 30 2012 18:51:58
%S 1,-7,4,-28,16,-112,64,-448,256,-1792,1024,-7168,4096,-28672,16384,
%T -114688,65536,-458752,262144,-1835008,1048576,-7340032,4194304,
%U -29360128,16777216,-117440512,67108864,-469762048,268435456,-1879048192,1073741824
%N Alternated reading of A000302 and negated A002042.
%C Sequence can also be obtained by negating the first differences of A135520: a(n)=A135520(n)-A135520(n+1).
%F a(2n) = A000302(n). a(2n+1) = -A002042(n) .
%F a(2n) = -7a(2n-1). a(2n)-a(2n-1) = A002089(n-1). a(n)+a(n+1) = -3*A135520(n).
%F O.g.f.: (7x-1)/((2x-1)(2x+1)). - _R. J. Mathar_, Jul 14 2008
%K sign,less
%O 0,2
%A _Paul Curtz_, Jul 12 2008
%E Edited by _R. J. Mathar_, Jul 14 2008
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