Expansion of 2/(1-2x+sqrt(1-4x+4x^3)).

Terms

a(0) =1a(1) =2a(2) =5a(3) =13a(4) =36a(5) =104a(6) =311a(7) =955a(8) =2995a(9) =9553a(10) =30896a(11) =101082a(12) =333946a(13) =1112496a(14) =3732955a(15) =12605029a(16) =42800317a(17) =146046819a(18) =500555447a(19) =1722402303a(20) =5948047169a(21) =20607691517a(22) =71610355540a(23) =249520257106a(24) =871614139396