Number of 5-turn rook's tours on an n X n board summed over all starting positions.
A187192
Number of 5-turn rook's tours on an n X n board summed over all starting positions.
Terms
- a(0) =0a(1) =0a(2) =720a(3) =9792a(4) =58800a(5) =231840a(6) =705600a(7) =1800960a(8) =4046112a(9) =8251200a(10) =15594480a(11) =27720000a(12) =46846800a(13) =75889632a(14) =118591200a(15) =179665920a(16) =264955200a(17) =381594240a(18) =538190352
External references
- oeis: A187192