Erroneous version of A112146.

Terms

a(0) =1a(1) =9a(2) =-4a(3) =36a(4) =2a(5) =126a(6) =12a(7) =324a(8) =-21a(9) =801a(10) =4a(11) =1764a(12) =36a(13) =3744a(14) =-68a(15) =7452a(16) =21