Eight white queens and one red queen on a 3 X 3 chessboard. G.f.: (1+x)/(1-5*x-3*x^2).
A180035
Eight white queens and one red queen on a 3 X 3 chessboard. G.f.: (1+x)/(1-5*x-3*x^2).
Terms
- a(0) =1a(1) =6a(2) =33a(3) =183a(4) =1014a(5) =5619a(6) =31137a(7) =172542a(8) =956121a(9) =5298231a(10) =29359518a(11) =162692283a(12) =901539969a(13) =4995776694a(14) =27683503377a(15) =153404846967a(16) =850074744966
External references
- oeis: A180035