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), (1, -1, -1), (1, 1, 1)}.
A149529
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), (1, -1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =11a(4) =55a(5) =167a(6) =799a(7) =2809a(8) =13253a(9) =50221a(10) =237145a(11) =935853a(12) =4453741a(13) =18013565a(14) =86440349a(15) =356002275a(16) =1718466879a(17) =7185616567a(18) =34812951807a(19) =147461259851a(20) =716217783119
External references
- oeis: A149529