Expansion of 1/(1-2*x-3*x^2-3*x^3).

Terms

a(0) =1a(1) =2a(2) =7a(3) =23a(4) =73a(5) =236a(6) =760a(7) =2447a(8) =7882a(9) =25385a(10) =81757a(11) =263315a(12) =848056a(13) =2731328a(14) =8796769a(15) =28331690a(16) =91247671a(17) =293880719a(18) =946499521a(19) =3048384212a(20) =9817909144a(21) =31620469487a(22) =101839819042a(23) =327994773977