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, -1, 1), (1, 0, -1)}.
A148392
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, -1, 1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =16a(5) =52a(6) =178a(7) =625a(8) =2229a(9) =8292a(10) =31844a(11) =123850a(12) =487577a(13) =1939259a(14) =7783926a(15) =31652369a(16) =130184871a(17) =539206880a(18) =2246282327a(19) =9408346891a(20) =39623252299a(21) =167927239399a(22) =715732297981
External references
- oeis: A148392