Eight rooks and one berserker on a 3 X 3 chessboard. G.f.: (1+x+x^2)/(1-3*x-5*x^2).

A180140

Eight rooks and one berserker on a 3 X 3 chessboard. G.f.: (1+x+x^2)/(1-3*x-5*x^2).

Terms

    a(0) =1a(1) =4a(2) =18a(3) =74a(4) =312a(5) =1306a(6) =5478a(7) =22964a(8) =96282a(9) =403666a(10) =1692408a(11) =7095554a(12) =29748702a(13) =124723876a(14) =522915138a(15) =2192364794a(16) =9191670072a(17) =38536834186a(18) =161568852918a(19) =677390729684

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