Number of geometrically distinct open knight's tours of a 3 X n chessboard.

A169777

Number of geometrically distinct open knight's tours of a 3 X n chessboard.

Terms

    a(0) =3a(1) =0a(2) =0a(3) =14a(4) =104a(5) =146a(6) =773a(7) =2698a(8) =14350a(9) =32296a(10) =161714a(11) =460022a(12) =2159794a(13) =5851548a(14) =26468357a(15) =76442996a(16) =330719293a(17) =965759972a(18) =4056479056a(19) =12186078360a(20) =49668414086a(21) =151760518296a(22) =604396415979

External references