Ten's complement of the factorials.

Terms

a(0) =9a(1) =8a(2) =4a(3) =76a(4) =880a(5) =280a(6) =4960a(7) =59680a(8) =637120a(9) =6371200a(10) =60083200a(11) =520998400a(12) =3772979200a(13) =12821708800