Number of ways to place 7n nonattacking kings on a vertical cylinder 14 X 2n.

A195595

Number of ways to place 7n nonattacking kings on a vertical cylinder 14 X 2n.

Terms

    a(0) =256a(1) =6060a(2) =58776a(3) =358564a(4) =1649420a(5) =6286658a(6) =20984924a(7) =63558566a(8) =178909300a(9) =476033636a(10) =1212120160a(11) =2980927200a(12) =7129922604a(13) =16675350430a(14) =38293956836a(15) =86629645122a(16) =193553210580a(17) =427974677968a(18) =938053730248

External references