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, 0), (-1, 1, 1), (0, 1, -1), (1, 0, 0)}.
A148642
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, 0), (-1, 1, 1), (0, 1, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =6a(4) =22a(5) =64a(6) =227a(7) =776a(8) =2854a(9) =10455a(10) =39319a(11) =149787a(12) =579560a(13) =2257337a(14) =8887284a(15) =35287573a(16) =141013188a(17) =566875691a(18) =2292206719a(19) =9315490488a(20) =38020945055a(21) =155804714945a(22) =640940906466
External references
- oeis: A148642