Number of ways to place k non-attacking ferses on an n x n cylindrical chessboard, summed over all k >= 0.
A212271
Number of ways to place k non-attacking ferses on an n x n cylindrical chessboard, summed over all k >= 0.
Terms
- a(0) =2a(1) =9a(2) =80a(3) =1600a(4) =79033a(5) =8156736a(6) =2055960192
External references
- oeis: A212271