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, 0, 0), (0, 1, 1), (1, -1, 0), (1, 0, -1), (1, 0, 0)}.
A150608
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, 0, 0), (0, 1, 1), (1, -1, 0), (1, 0, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =27a(4) =111a(5) =474a(6) =2077a(7) =9296a(8) =42201a(9) =193760a(10) =897717a(11) =4189777a(12) =19674643a(13) =92860286a(14) =440194367a(15) =2094517473a(16) =9998494197a(17) =47865696280a(18) =229724000261
External references
- oeis: A150608