Numerator of Euler(n, 1/8).

Terms

a(0) =1a(1) =-3a(2) =-7a(3) =117a(4) =497a(5) =-15123a(6) =-95767a(7) =4116837a(8) =34741217a(9) =-1921996323a(10) =-20273087527