Expansion of 3*(1+2*x+6 x^2)/(1-24*x^3).

Terms

a(0) =3a(1) =6a(2) =18a(3) =72a(4) =144a(5) =432a(6) =1728a(7) =3456a(8) =10368a(9) =41472a(10) =82944a(11) =248832a(12) =995328a(13) =1990656a(14) =5971968a(15) =23887872a(16) =47775744a(17) =143327232a(18) =573308928a(19) =1146617856a(20) =3439853568a(21) =13759414272a(22) =27518828544a(23) =82556485632a(24) =330225942528a(25) =660451885056