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, -1), (-1, 1, 1), (0, -1, 1), (1, 1, 0)}.
A149189
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, -1), (-1, 1, 1), (0, -1, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =10a(4) =37a(5) =126a(6) =472a(7) =1765a(8) =6878a(9) =26812a(10) =107028a(11) =428929a(12) =1740321a(13) =7098405a(14) =29176482a(15) =120454790a(16) =500030927a(17) =2083449191a(18) =8715752041a(19) =36576288141a(20) =153968912861a(21) =649844829206
External references
- oeis: A149189