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, 0, -1), (1, 0, 1)}.
A150252
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, 0, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =22a(4) =85a(5) =344a(6) =1424a(7) =6016a(8) =26086a(9) =114645a(10) =510038a(11) =2288133a(12) =10345031a(13) =47159397a(14) =216358519a(15) =997956360a(16) =4623418965a(17) =21506672434a(18) =100447579379a(19) =470804874158
External references
- oeis: A150252