Number of solutions to the rook problem on an n X n board having a certain symmetry group (see Robinson for details).
A000900
Number of solutions to the rook problem on an n X n board having a certain symmetry group (see Robinson for details).
Terms
- a(0) =0a(1) =0a(2) =0a(3) =1a(4) =2a(5) =10a(6) =28a(7) =106a(8) =344a(9) =1272a(10) =4592a(11) =17692a(12) =69384a(13) =283560a(14) =1191984a(15) =5171512a(16) =23087168a(17) =105883456a(18) =498572416a(19) =2404766224a(20) =11878871456a(21) =59975885856a(22) =309439708352
External references
- oeis: A000900