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, 1, 0), (0, 1, -1), (0, 1, 0), (1, 0, 1)}.
A150277
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, 1, 0), (0, 1, -1), (0, 1, 0), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =23a(4) =89a(5) =353a(6) =1471a(7) =6242a(8) =26712a(9) =116074a(10) =510008a(11) =2254425a(12) =10033860a(13) =44944615a(14) =202217909a(15) =913563797a(16) =4143671773a(17) =18855556442a(18) =86046484485a(19) =393738362852
External references
- oeis: A150277