%I A133140
%S A133140 2,4,6,10,18,34,66,130,258,514,1026,2050,4098,8194,16386,32770,65538,
%T A133140 131074,262146,524290,1048578,2097154,4194306
%N A133140 Sum of the coefficients of the polynomial Q(n,x)=(1+x)[(1+x)^(n-1)+x^(n-1)], 
               Q(0,x)=2.
%C A133140 Also row sums of A133138. - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), 
               Jun 12 2008
%F A133140 a(n)=2*A094373(n). a(n)=A052548(n), n>0. - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), 
               Jun 12 2008
%Y A133140 Sequence in context: A102477 A018074 A000067 this_sequence A026680 A164141 
               A034872
%Y A133140 Adjacent sequences: A133137 A133138 A133139 this_sequence A133141 A133142 
               A133143
%K A133140 nonn
%O A133140 0,1
%A A133140 Paul Curtz (bpcrtz(AT)free.fr), Sep 21 2007
%E A133140 Edited by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jun 12 2008