Expansion of 1/((1-5*x)(1-6*x)(1-7*x)).

Terms

a(0) =1a(1) =18a(2) =217a(3) =2190a(4) =19981a(5) =170898a(6) =1398097a(7) =11075670a(8) =85654261a(9) =650280378a(10) =4865931577a(11) =35994162750a(12) =263799130141