Expansion of g.f. 1/((1 - 4*x)*(1 - 6*x)).

Terms

a(0) =1a(1) =10a(2) =76a(3) =520a(4) =3376a(5) =21280a(6) =131776a(7) =807040a(8) =4907776a(9) =29708800a(10) =179301376a(11) =1080002560a(12) =6496792576a(13) =39047864320a(14) =234555621376