Number of 4-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.

A187299

Number of 4-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) =0a(2) =54a(3) =196a(4) =480a(5) =876a(6) =1398a(7) =2036a(8) =2790a(9) =3660a(10) =4646a(11) =5748a(12) =6966a(13) =8300a(14) =9750a(15) =11316a(16) =12998a(17) =14796a(18) =16710a(19) =18740a(20) =20886a(21) =23148a(22) =25526a(23) =28020a(24) =30630a(25) =33356a(26) =36198a(27) =39156a(28) =42230a(29) =45420

External references