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, 1), (-1, 1, 0), (1, 0, 0), (1, 1, -1), (1, 1, 1)}.
A150792
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, 1), (-1, 1, 0), (1, 0, 0), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =30a(4) =138a(5) =594a(6) =2839a(7) =12892a(8) =62672a(9) =292932a(10) =1436996a(11) =6835949a(12) =33718615a(13) =162274753a(14) =803263075a(15) =3897110532a(16) =19337079017a(17) =94365819222a(18) =469026208827
External references
- oeis: A150792