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, 0, 0), (0, 0, 1), (0, 1, 1), (1, -1, 1), (1, 0, -1)}.
A150563
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, 0, 0), (0, 0, 1), (0, 1, 1), (1, -1, 1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =26a(4) =107a(5) =454a(6) =1993a(7) =8925a(8) =40635a(9) =187211a(10) =871038a(11) =4084109a(12) =19272792a(13) =91434267a(14) =435748119a(15) =2084649727a(16) =10006344868a(17) =48169762525a(18) =232474453125
External references
- oeis: A150563