Erroneous version of A008296.

Terms

a(0) =1a(1) =1a(2) =1a(3) =-1a(4) =3a(5) =1a(6) =2a(7) =-1a(8) =6a(9) =1a(10) =-6a(11) =0a(12) =4a(13) =5a(14) =10a(15) =1a(16) =24a(17) =4a(18) =-15a(19) =25a(20) =15a(21) =1a(22) =-120a(23) =-28a(24) =49a(25) =-35