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, -1), (1, -1, 1), (1, 0, 0), (1, 1, 0)}.
A150119
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, -1), (1, -1, 1), (1, 0, 0), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =19a(4) =72a(5) =278a(6) =1151a(7) =4785a(8) =20830a(9) =90633a(10) =406619a(11) =1820791a(12) =8341056a(13) =38108083a(14) =177174571a(15) =821368540a(16) =3861043640a(17) =18098240838a(18) =85798070413a(19) =405641837783
External references
- oeis: A150119