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, 1, 0), (0, 1, -1), (1, 0, 0), (1, 1, 1)}.
A150771
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, 1, 0), (0, 1, -1), (1, 0, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =30a(4) =128a(5) =554a(6) =2450a(7) =11068a(8) =50454a(9) =232576a(10) =1081161a(11) =5051101a(12) =23756457a(13) =112147893a(14) =531708174a(15) =2529355830a(16) =12066683478a(17) =57726437428a(18) =276784459827
External references
- oeis: A150771