Expansion of e.g.f. exp(x * (1-3*x)).

Terms

a(0) =1a(1) =1a(2) =-5a(3) =-17a(4) =73a(5) =481a(6) =-1709a(7) =-19025a(8) =52753a(9) =965953a(10) =-1882709a(11) =-59839889a(12) =64418905a(13) =4372890913a(14) =-651783677a(15) =-367974620369a(16) =-309314089439