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, 0), (1, 0, 1), (1, 1, 0)}.
A150478
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, 0), (1, 0, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =25a(4) =100a(5) =388a(6) =1632a(7) =6786a(8) =29287a(9) =125113a(10) =550128a(11) =2406584a(12) =10712694a(13) =47474007a(14) =213394404a(15) =956947559a(16) =4332774635a(17) =19577754886a(18) =89181193579a(19) =405820090361
External references
- oeis: A150478