Number of ways to place 3 nonattacking queens on an n X n toroidal board.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =100a(5) =576a(6) =2156a(7) =7168a(8) =17496a(9) =41600a(10) =82280a(11) =161280a(12) =280540a(13) =486080a(14) =774900a(15) =1232896a(16) =1844976a(17) =2757888a(18) =3933456a(19) =5606400a(20) =7699860a(21) =10570560a(22) =14081980a(23) =18754560a(24) =24365000a(25) =31647616a(26) =40258296a(27) =51204608a(28) =63979916