Expansion of 1/sqrt(1-6x-11x^2).

Terms

a(0) =1a(1) =3a(2) =19a(3) =117a(4) =771a(5) =5193a(6) =35629a(7) =247467a(8) =1734931a(9) =12250953a(10) =87006249a(11) =620818047a(12) =4447016781a(13) =31959556983a(14) =230331965379