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), (0, 1, -1), (0, 1, 1), (1, 0, -1), (1, 1, -1)}.
A149160
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), (0, 1, -1), (0, 1, 1), (1, 0, -1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =9a(4) =40a(5) =113a(6) =524a(7) =1692a(8) =8000a(9) =27851a(10) =133516a(11) =489230a(12) =2367023a(13) =9001776a(14) =43825044a(15) =171427906a(16) =838457474a(17) =3352831063a(18) =16457057856a(19) =66986311271a(20) =329704918985
External references
- oeis: A149160