%I #4 Mar 30 2012 17:20:57
%S 1,1,1,1,3,13,41,97,203,507,1671,5695,17345,48107,133867,404635,
%T 1301205,4156061,12789845,38604189,118183255,371846705,1185390789,
%U 3757924141,11797229967,36991159495,116904780811,372629921851
%N Recip transform of 2*(1 + x^2 + x^5 + x^6)-1/(1-x).
%C Sign diagram of generating sequence: +-+--++--------...
%K nonn
%O 0,5
%A _Olivier GĂ©rard_