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, 0, 0), (1, -1, -1), (1, 1, 0), (1, 1, 1)}.
A150911
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, 0, 0), (1, -1, -1), (1, 1, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =31a(4) =145a(5) =596a(6) =2802a(7) =12395a(8) =58953a(9) =269877a(10) =1295133a(11) =6050077a(12) =29221939a(13) =138340308a(14) =671360915a(15) =3208049603a(16) =15624838414a(17) =75174582036a(18) =367173822737
External references
- oeis: A150911