Recip transform of 2*(1 + x^3 + x^4 + x^6)-1/(1-x).

Terms

a(0) =1a(1) =1a(2) =3a(3) =9a(4) =31a(5) =113a(6) =429a(7) =1681a(8) =6739a(9) =27523a(10) =114093a(11) =478843a(12) =2030689a(13) =8688595a(14) =37461651a(15) =162604083a(16) =709963053a(17) =3116099485a(18) =13740924463a(19) =60847717965a(20) =270470978627