Expansion of 1/((1-x)(1-3x)(1-5x)).

Terms

a(0) =1a(1) =9a(2) =58a(3) =330a(4) =1771a(5) =9219a(6) =47188a(7) =239220a(8) =1205941a(9) =6059229a(10) =30384718a(11) =152189310a(12) =761743711a(13) =3811110039a(14) =19062724648a(15) =95335146600a(16) =476740303081