Number of 2-step one space leftwards or up, two space rightwards or down asymmetric rook's tours on an n X n board summed over all starting positions.

A187297

Number of 2-step one space leftwards or up, two space rightwards or down asymmetric rook's tours on an n X n board summed over all starting positions.

Terms

    a(0) =0a(1) =4a(2) =18a(3) =40a(4) =70a(5) =108a(6) =154a(7) =208a(8) =270a(9) =340a(10) =418a(11) =504a(12) =598a(13) =700a(14) =810a(15) =928a(16) =1054a(17) =1188a(18) =1330a(19) =1480a(20) =1638a(21) =1804a(22) =1978a(23) =2160a(24) =2350a(25) =2548a(26) =2754a(27) =2968a(28) =3190a(29) =3420

External references