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, 0), (1, 0, 1), (1, 1, 0)}.
A150385
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, 0), (1, 0, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =23a(4) =98a(5) =361a(6) =1641a(7) =6456a(8) =29975a(9) =122797a(10) =578538a(11) =2430398a(12) =11586047a(13) =49532072a(14) =238059400a(15) =1031522751a(16) =4985820454a(17) =21833680533a(18) =105999201265a(19) =468105465078
External references
- oeis: A150385