Number of ways to place 6 nonattacking queens on an n X n toroidal board.

A178722

Number of ways to place 6 nonattacking queens on an n X n toroidal board.

Terms

    a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =196a(7) =3072a(8) =42768a(9) =550000a(10) =3573856a(11) =25009344a(12) =102800672a(13) =454967744a(14) =1441238400a(15) =4811118592a(16) =12616778208a(17) =34692705648a(18) =79514466480a(19) =189770459200a(20) =392908083876a(21) =842040318416

External references