Eight white queens and one red queen on a 3 X 3 chessboard. G.f.: (1 + x)/(1 - 5*x - 5*x^2).
A180033
Eight white queens and one red queen on a 3 X 3 chessboard. G.f.: (1 + x)/(1 - 5*x - 5*x^2).
Terms
- a(0) =1a(1) =6a(2) =35a(3) =205a(4) =1200a(5) =7025a(6) =41125a(7) =240750a(8) =1409375a(9) =8250625a(10) =48300000a(11) =282753125a(12) =1655265625a(13) =9690093750a(14) =56726796875a(15) =332084453125
External references
- oeis: A180033