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), (0, 0, -1), (1, 0, 0), (1, 1, 1)}.
A150775
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), (0, 0, -1), (1, 0, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =30a(4) =130a(5) =560a(6) =2515a(7) =11414a(8) =52747a(9) =245438a(10) =1153428a(11) =5451143a(12) =25915808a(13) =123731198a(14) =593089167a(15) =2852055352a(16) =13755006246a(17) =66500899299a(18) =322217412195
External references
- oeis: A150775