Eight rooks and one berserker on a 3 X 3 chessboard. G.f.: 1/(1 - 4*x - 3*x^2 + 6*x^3).

A180146

Eight rooks and one berserker on a 3 X 3 chessboard. G.f.: 1/(1 - 4*x - 3*x^2 + 6*x^3).

Terms

    a(0) =1a(1) =4a(2) =19a(3) =82a(4) =361a(5) =1576a(6) =6895a(7) =30142a(8) =131797a(9) =576244a(10) =2519515a(11) =11016010a(12) =48165121a(13) =210591424a(14) =920764999a(15) =4025843542a(16) =17602120621a(17) =76961423116a(18) =336496993075

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