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

Terms

a(0) =1a(1) =13a(2) =122a(3) =1010a(4) =7851a(5) =58863a(6) =431572a(7) =3118660a(8) =22318901a(9) =158673713a(10) =1122923022a(11) =7921496310a(12) =55755649951a(13) =391815428563