Number of ways to place 5 nonattacking knights on an n X n toroidal board.

A172532

Number of ways to place 5 nonattacking knights on an n X n toroidal board.

Terms

    a(0) =0a(1) =0a(2) =0a(3) =128a(4) =120a(5) =30312a(6) =283906a(7) =1872064a(8) =8643186a(9) =31702920a(10) =98179400a(11) =267487920a(12) =659015500a(13) =1496908840a(14) =3179369070a(15) =6382030592a(16) =12207535134a(17) =22396355496a(18) =39617305308a(19) =67860021680

External references