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), (0, 1, -1), (1, 0, 0), (1, 0, 1)}.
A150526
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), (0, 1, -1), (1, 0, 0), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =25a(4) =104a(5) =444a(6) =1951a(7) =8800a(8) =40379a(9) =187022a(10) =874711a(11) =4127275a(12) =19582155a(13) =93334059a(14) =446949603a(15) =2148224946a(16) =10353777396a(17) =50036100549a(18) =242403974586
External references
- oeis: A150526