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

Terms

a(0) =1a(1) =3a(2) =12a(3) =54a(4) =261a(5) =1323a(6) =6930a(7) =37152a(8) =202554a(9) =1118286a(10) =6233760a(11) =35014356a(12) =197881866a(13) =1123990182a(14) =6411554028a(15) =36705925656a(16) =210797967321