Eight white queens and one red queen on a 3 X 3 chessboard. G.f.: (1+x)/(1-5*x-2*x^2).
A180037
Eight white queens and one red queen on a 3 X 3 chessboard. G.f.: (1+x)/(1-5*x-2*x^2).
Terms
- a(0) =1a(1) =6a(2) =32a(3) =172a(4) =924a(5) =4964a(6) =26668a(7) =143268a(8) =769676a(9) =4134916a(10) =22213932a(11) =119339492a(12) =641125324a(13) =3444305604a(14) =18503778668a(15) =99407504548a(16) =534045080076
External references
- oeis: A180037