Number of n-moves paths of a king starting and ending at the origin of an infinite chessboard.

A094061

Number of n-moves paths of a king starting and ending at the origin of an infinite chessboard.

Terms

    a(0) =1a(1) =0a(2) =8a(3) =24a(4) =216a(5) =1200a(6) =8840a(7) =58800a(8) =423640a(9) =3000480a(10) =21824208a(11) =158964960a(12) =1171230984a(13) =8668531872a(14) =64574844048a(15) =483114856224

External references