Search: id:A141125
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%I A141125
%S A141125 1,4,4,16,16,64,64,256,256,1024,1024,4096,4096,16384,16384,65536,65536,
%T A141125 262144,262144,1048576,1048576,4194304,4194304,16777216,16777216,
%U A141125 67108864,67108864,268435456,268435456
%V A141125 1,4,-4,-16,16,64,-64,-256,256,1024,-1024,-4096,4096,16384,-16384,-65536,
               65536,262144,
%W A141125 -262144,-1048576,1048576,4194304,-4194304,-16777216,16777216,67108864,
               -67108864,
%X A141125 -268435456,268435456
%N A141125 Hankel transform of a transform of Fibonacci numbers.
%C A141125 Hankel transform of A100095(n+1).
%F A141125 G.f.: (1+4x)/(1+4x^2); a(n)=2^n*(cos(pi*n/2)+2*sin(pi*n/2)).
%Y A141125 Cf. A141124.
%Y A141125 Sequence in context: A075882 A125757 A056450 this_sequence A164111 A164906 
               A129884
%Y A141125 Adjacent sequences: A141122 A141123 A141124 this_sequence A141126 A141127 
               A141128
%K A141125 easy,sign
%O A141125 0,2
%A A141125 Paul Barry (pbarry(AT)wit.ie), Jun 05 2008

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