Number of ways to place 3n nonattacking kings on a 6 X 2n cylindrical chessboard.
A194645
Number of ways to place 3n nonattacking kings on a 6 X 2n cylindrical chessboard.
Terms
- a(0) =32a(1) =100a(2) =344a(3) =1220a(4) =4392a(5) =15988a(6) =58776a(7) =218052a(8) =815816a(9) =3076180a(10) =11682296a(11) =44653028a(12) =171670440a(13) =663421684a(14) =2575592664a(15) =10039703172a(16) =39273896840a(17) =154109956756a(18) =606353229752
External references
- oeis: A194645