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, -1), (1, -1, 0), (1, 1, -1), (1, 1, 1)}.
A149625
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, -1), (1, -1, 0), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =15a(4) =67a(5) =245a(6) =1133a(7) =4649a(8) =21837a(9) =94019a(10) =446511a(11) =1985665a(12) =9507117a(13) =43229887a(14) =208191147a(15) =961692903a(16) =4652119203a(17) =21745052861a(18) =105563020121a(19) =497971021413
External references
- oeis: A149625