Numerator of z-sequence for Sheffer triangle A060081.

Terms

a(0) =1a(1) =0a(2) =-1a(3) =0a(4) =-17a(5) =0a(6) =-1955a(7) =0a(8) =-44089a(9) =0a(10) =-4627969a(11) =0a(12) =-10431967727a(13) =0a(14) =-424734574531a(15) =0a(17) =0a(19) =0a(21) =0a(23) =0a(25) =0a(27) =0