Expansion of (1-x-sqrt(1-2x-19x^2))/(10x^2).

Terms

a(0) =1a(1) =1a(2) =6a(3) =16a(4) =81a(5) =301a(6) =1451a(7) =6231a(8) =29891a(9) =137731a(10) =666976a(11) =3193026a(12) =15658831a(13) =76719891a(14) =380788006a(15) =1894818776a(16) =9502977851a(17) =47822585931a(18) =241944876266