Number of ways to place 6n nonattacking kings on a vertical cylinder 12 X 2n.

A195594

Number of ways to place 6n nonattacking kings on a vertical cylinder 12 X 2n.

Terms

    a(0) =128a(1) =2102a(2) =15988a(3) =81606a(4) =327192a(5) =1118398a(6) =3419648a(7) =9643562a(8) =25603228a(9) =64923594a(10) =158877948a(11) =378088270a(12) =879980720a(13) =2011806182a(14) =4532900488a(15) =10091643138a(16) =22244251284a(17) =48622120786a(18) =105526014500a(19) =227633451206a(20) =488451508168

External references