Number of ways to place 3 nonattacking amazons (superqueens) on an n X n toroidal board.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =588a(7) =3328a(8) =9720a(9) =27600a(10) =59048a(11) =124992a(12) =226460a(13) =408464a(14) =666900a(15) =1086464a(16) =1650768a(17) =2505168a(18) =3610000a(19) =5198400a(20) =7191828a(21) =9945232a(22) =13320220a(23) =17835264a(24) =23265000a(25) =30341584a(26) =38718648a(27) =49401408a(28) =61880780a(29) =77504400