Number of 4-step one or two space at a time rook's tours on an n X n board summed over all starting positions.

A187289

Number of 4-step one or two space at a time rook's tours on an n X n board summed over all starting positions.

Terms

    a(0) =0a(1) =8a(2) =288a(3) =1256a(4) =3084a(5) =5712a(6) =9120a(7) =13288a(8) =18216a(9) =23904a(10) =30352a(11) =37560a(12) =45528a(13) =54256a(14) =63744a(15) =73992a(16) =85000a(17) =96768a(18) =109296a(19) =122584a(20) =136632a(21) =151440a(22) =167008a(23) =183336a(24) =200424a(25) =218272a(26) =236880a(27) =256248a(28) =276376a(29) =297264

External references