The number of 3D walks of semilength n in a quadrant returning to the origin.
A302178
The number of 3D walks of semilength n in a quadrant returning to the origin.
Terms
- a(0) =1a(1) =4a(2) =40a(3) =570a(4) =9898a(5) =195216a(6) =4209084a(7) =96941130a(8) =2349133930a(9) =59272544760
External references
- oeis: A302178