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), (-1, 0, 1), (1, 1, 0), (1, 1, 1)}.
A150904
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), (-1, 0, 1), (1, 1, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =29a(4) =141a(5) =518a(6) =2559a(7) =10010a(8) =49737a(9) =201902a(10) =1006037a(11) =4186127a(12) =20888571a(13) =88476550a(14) =441843335a(15) =1896865677a(16) =9477117035a(17) =41119442928a(18) =205497571867a(19) =899303209251
External references
- oeis: A150904