Number of walks of length 2*n+2 from origin to (1,1,0) on a cubic lattice.

A135394

Number of walks of length 2*n+2 from origin to (1,1,0) on a cubic lattice.

Terms

    a(0) =2a(1) =48a(2) =1200a(3) =31920a(4) =890820a(5) =25768512a(6) =766053288a(7) =23265871200a(8) =718834982580

External references