Eight white queens and one red queen on a 3 X 3 chessboard. G.f.: (1 - 3*x)/(1 - 5*x - 2*x^2).

A180038

Eight white queens and one red queen on a 3 X 3 chessboard. G.f.: (1 - 3*x)/(1 - 5*x - 2*x^2).

Terms

    a(0) =1a(1) =2a(2) =12a(3) =64a(4) =344a(5) =1848a(6) =9928a(7) =53336a(8) =286536a(9) =1539352a(10) =8269832a(11) =44427864a(12) =238678984a(13) =1282250648a(14) =6888611208a(15) =37007557336a(16) =198815009096

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