Number of 2 X 2 matrices with all elements in {-n,..,0,..,n} with permanent = determinant * n.

Terms

a(0) =1a(1) =45a(2) =81a(3) =233a(4) =289a(5) =601a(6) =625a(7) =1113a(8) =1153a(9) =1785a(10) =1681a(11) =2761a(12) =2401a(13) =3577a(14) =3505a(15) =4665a(16) =4225a(17) =6185a(18) =5329a(19) =7673a(20) =6945a(21) =8601a(22) =7921a(23) =11033a(24) =9665a(25) =12265a(26) =11793a(27) =14089a(28) =12769a(29) =18073