Number of ways to place 2 nonattacking amazons (superqueens) on an n X n toroidal board.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =144a(6) =392a(7) =896a(8) =1620a(9) =2800a(10) =4356a(11) =6624a(12) =9464a(13) =13328a(14) =18000a(15) =24064a(16) =31212a(17) =40176a(18) =50540a(19) =63200a(20) =77616a(21) =94864a(22) =114264a(23) =137088a(24) =162500a(25) =191984a(26) =224532a(27) =261856a(28) =302760a(29) =349200