Number of 4-dimensional cubic lattice walks that start and end at the origin after 2n steps, free to pass through origin at intermediate stages.

A039699

Number of 4-dimensional cubic lattice walks that start and end at the origin after 2n steps, free to pass through origin at intermediate stages.

Terms

    a(0) =1a(1) =8a(2) =168a(3) =5120a(4) =190120a(5) =7939008a(6) =357713664a(7) =16993726464a(8) =839358285480

External references