Expansion of g.f. 1/(1 - 2*x + 8*x^2).

Terms

a(0) =1a(1) =2a(2) =-4a(3) =-24a(4) =-16a(5) =160a(6) =448a(7) =-384a(8) =-4352a(9) =-5632a(10) =23552a(11) =92160a(12) =-4096a(13) =-745472a(14) =-1458176a(15) =3047424a(16) =17760256a(17) =11141120a(18) =-119799808a(19) =-328728576a(20) =300941312a(21) =3231711232a(22) =4055891968a(23) =-17741905920a(24) =-67930947584a(25) =6073352192a(26) =555594285056