Main diagonal of A292133.

Terms

a(0) =1a(1) =-1a(2) =2a(3) =-21a(4) =220a(5) =-2705a(6) =40926a(7) =-733537a(8) =15124216a(9) =-352606050a(10) =9174382490a(11) =-263533561852