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

Terms

a(0) =1a(1) =-4a(2) =37a(3) =-232a(4) =1705a(5) =-11692a(6) =82573a(7) =-575824a(8) =4037329a(9) =-28241620a(10) =197750389a(11) =-1384075576a(12) =9689060473a(13) =-67821828988a(14) =474757585885