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

Terms

a(0) =1a(1) =1a(2) =3a(3) =11a(4) =43a(5) =183a(6) =815a(7) =3751a(8) =17713a(9) =85317a(10) =417539a(11) =2070355a(12) =10378707a(13) =52513683a(14) =267833407a(15) =1375511991a(16) =7107227481a(17) =36920353577a(18) =192710512163