Number of ways to place n^2 nonattacking kings on a 2n X 2n cylindrical chessboard.

A137432

Number of ways to place n^2 nonattacking kings on a 2n X 2n cylindrical chessboard.

Terms

    a(0) =1a(1) =4a(2) =32a(3) =344a(4) =4460a(5) =66532a(6) =1118398a(7) =20984924a(8) =437500380a(9) =10105541204a(10) =257860425672

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