Number of 6-step one or two space at a time rook's tours on an n X n board summed over all starting positions.

A187291

Number of 6-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) =0a(2) =1440a(3) =15424a(4) =57288a(5) =134408a(6) =248208a(7) =397152a(8) =580328a(9) =797160a(10) =1047532a(11) =1331408a(12) =1648788a(13) =1999672a(14) =2384060a(15) =2801952a(16) =3253348a(17) =3738248a(18) =4256652a(19) =4808560a(20) =5393972a(21) =6012888a(22) =6665308a(23) =7351232a(24) =8070660a(25) =8823592a(26) =9610028a(27) =10429968a(28) =11283412

External references