%I A138477
%S A138477 0,0,1,2,3,6,15,30,55,110,231,462,903,1806,3655,7310,14535,29070,58311,
%T A138477 116622,232903,465806,932295,1864590,3727815,7455630,14913991,29827982,
%U A138477 59650503
%N A138477 Mix A084175 and 2*A084175.
%F A138477 O.g.f.: x^2/((2*x-1)(x-1)(1+x)(1+2*x^2)). a(2n) = A084175(n). a(2n+1)=2*A084175(n). 
               a(n) = 2a(n-1) -a(n-2) +2a(n-3) +2a(n-4) -4a(n-5). - R. J. Mathar 
               (mathar(AT)strw.leidenuniv.nl), May 19 2008
%Y A138477 Sequence in context: A081945 A158027 A100249 this_sequence A052102 A053561 
               A147773
%Y A138477 Adjacent sequences: A138474 A138475 A138476 this_sequence A138478 A138479 
               A138480
%K A138477 nonn
%O A138477 0,4
%A A138477 Paul Curtz (bpcrtz(AT)free.fr), May 18 2008
%E A138477 More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), May 19 2008