%I A118406
%S A118406 1,2,2,4,4,8,14,28,52,104,206,412,820,1640,3278,6556,13108,26216,52430,
%T A118406 104860,209716,419432,838862,1677724,3355444,6710888,13421774,26843548,
%U A118406 53687092,107374184,214748366,429496732,858993460,1717986920,3435973838
%N A118406 Unsigned row sums of triangle A118404.
%F A118406 G.f.: A(x) = (1 - 2*x^2 - 5*x^4)/(1-x^4)/(1-2*x).
%o A118406 (PARI) {a(n)=polcoeff((1 - 2*x^2 - 5*x^4)/(1-x^4)/(1-2*x+x*O(x^n)),n,
               x)}
%Y A118406 Cf. A118404, A118405.
%Y A118406 Sequence in context: A000013 A064484 A063776 this_sequence A072488 A074818 
               A110199
%Y A118406 Adjacent sequences: A118403 A118404 A118405 this_sequence A118407 A118408 
               A118409
%K A118406 nonn
%O A118406 0,2
%A A118406 Paul D. Hanna (pauldhanna(AT)juno.com), Apr 27 2006