Numerator of Euler(n,8).

Terms

a(0) =1a(1) =15a(2) =56a(3) =1665a(4) =3080a(5) =45375a(6) =166376a(7) =9718545a(8) =8833160a(9) =127944225a(10) =461568296a(11) =13274709555a(12) =23784791240a(13) =339933981675