Number of closed walks of length 2*n on the 4-cube.

A092812

Number of closed walks of length 2*n on the 4-cube.

Terms

    a(0) =1a(1) =4a(2) =40a(3) =544a(4) =8320a(5) =131584a(6) =2099200a(7) =33562624a(8) =536903680a(9) =8590065664a(10) =137439477760

External references