Poly-Cauchy numbers c_4^(-n).

Terms

a(0) =2a(1) =4a(2) =-10a(3) =-116a(4) =-538a(5) =-1316a(6) =3110a(7) =68044a(8) =593702a(9) =4117564a(10) =25598630a(11) =149298604a(12) =835538342a(13) =4545417244a(14) =24232768550a(15) =127291207564a(16) =661279993382