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, 0, 0), (1, 1, 1)}.
A150512
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, 0, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =25a(4) =103a(5) =412a(6) =1749a(7) =7374a(8) =32367a(9) =140540a(10) =624741a(11) =2762807a(12) =12445171a(13) =55767796a(14) =253001603a(15) =1144270531a(16) =5228115697a(17) =23820553506a(18) =109334777759a(19) =500949195171
External references
- oeis: A150512