Number of ways to place 10n nonattacking kings on a vertical cylinder 20 X 2n.

A195659

Number of ways to place 10n nonattacking kings on a vertical cylinder 20 X 2n.

Terms

    a(0) =2048a(1) =148352a(2) =3076180a(3) =33175486a(4) =239238888a(5) =1314160492a(6) =5937279840a(7) =23174548666a(8) =80812754568a(9) =257860425672a(10) =766319864440

External references