Convolutory inverse of the factorial sequence.

Terms

a(0) =1a(1) =-2a(2) =-2a(3) =-8a(4) =-44a(5) =-296a(6) =-2312a(7) =-20384a(8) =-199376a(9) =-2138336a(10) =-24936416a(11) =-314142848a(12) =-4252773824a(13) =-61594847360a(14) =-950757812864