Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 0, 0), (0, 1, 0), (1, 0, -1), (1, 1, 1)}.
A150605
Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 0, 0), (0, 1, 0), (1, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =27a(4) =111a(5) =470a(6) =2029a(7) =8960a(8) =40217a(9) =182618a(10) =835343a(11) =3849661a(12) =17863189a(13) =83378460a(14) =390908003a(15) =1839698669a(16) =8689247415a(17) =41178873728a(18) =195713004493a(19) =932470087023
External references
- oeis: A150605