Number of 2n-move closed knight paths on an unbounded chessboard from a given square to the same square.

A254129

Number of 2n-move closed knight paths on an unbounded chessboard from a given square to the same square.

Terms

    a(0) =1a(1) =8a(2) =168a(3) =5840a(4) =261800a(5) =13180608a(6) =702273264a(7) =38641656768

External references