Recip transform of 2*(1 + x^3 + x^5 + x^6)-1/(1-x).

Terms

a(0) =1a(1) =1a(2) =3a(3) =9a(4) =33a(5) =125a(6) =501a(7) =2065a(8) =8739a(9) =37687a(10) =165133a(11) =732915a(12) =3288431a(13) =14890715a(14) =67964547a(15) =312347427a(16) =1444163637a(17) =6712965621a(18) =31352965503a(19) =147060094981a(20) =692437504773