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, -1), (-1, 1, 1), (0, 1, 0), (1, 0, 0)}.
A149933
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, -1), (-1, 1, 1), (0, 1, 0), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =15a(4) =49a(5) =165a(6) =584a(7) =2134a(8) =7930a(9) =30004a(10) =115286a(11) =448041a(12) =1758361a(13) =6960484a(14) =27766468a(15) =111490323a(16) =450177914a(17) =1827430423a(18) =7453136569a(19) =30521419571a(20) =125469410644a(21) =517600974331
External references
- oeis: A149933