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, -1, 1), (1, 0, 1)}.
A149039
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, -1, 1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =10a(4) =35a(5) =137a(6) =548a(7) =2252a(8) =9592a(9) =41450a(10) =181418a(11) =806184a(12) =3618645a(13) =16367203a(14) =74623914a(15) =342518519a(16) =1580323410a(17) =7327815923a(18) =34132414535a(19) =159587586198a(20) =748738458137
External references
- oeis: A149039