Expansion of 1/((1-3*x) * (1-7*x))^(3/2).

Terms

a(0) =1a(1) =15a(2) =156a(3) =1400a(4) =11655a(5) =92925a(6) =721140a(7) =5496300a(8) =41361255a(9) =308344025a(10) =2282167272a(11) =16795140180a(12) =123030071437a(13) =897791417775