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

Terms

a(0) =1a(1) =1a(2) =3a(3) =11a(4) =45a(5) =197a(6) =901a(7) =4261a(8) =20663a(9) =102191a(10) =513453a(11) =2613573a(12) =13449075a(13) =69849063a(14) =365658819a(15) =1927465339a(16) =10221707709a(17) =54498198789a(18) =291949801743