Expansion of 1/((1-2x)(1-4x)(1-7x)).

Terms

a(0) =1a(1) =13a(2) =119a(3) =953a(4) =7167a(5) =52185a(6) =373423a(7) =2646601a(8) =18657023a(9) =131122937a(10) =919956687a(11) =6448083369a(12) =45170133919a(13) =316325146969