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), (-1, 1, 0), (0, 1, -1), (1, 0, -1), (1, 0, 1)}.
A149358
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), (-1, 1, 0), (0, 1, -1), (1, 0, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =12a(4) =43a(5) =163a(6) =656a(7) =2698a(8) =11344a(9) =48724a(10) =212399a(11) =939687a(12) =4195518a(13) =18895902a(14) =85815964a(15) =392491390a(16) =1804983326a(17) =8343871333a(18) =38761066926a(19) =180795136179a(20) =846325495536
External references
- oeis: A149358