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, 0, 0), (0, 0, 1), (0, 1, 0), (1, -1, -1)}.
A149825
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, 0, 0), (0, 0, 1), (0, 1, 0), (1, -1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =4a(3) =10a(4) =28a(5) =85a(6) =275a(7) =910a(8) =3091a(9) =10837a(10) =38949a(11) =142254a(12) =526138a(13) =1971964a(14) =7491686a(15) =28773491a(16) =111407278a(17) =434643804a(18) =1709385164a(19) =6772781723a(20) =26994738921a(21) =108149870681a(22) =435557791070
External references
- oeis: A149825