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), (0, 1, 1), (1, -1, 1), (1, 1, 0)}.
A150525
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), (0, 1, 1), (1, -1, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =25a(4) =104a(5) =428a(6) =1881a(7) =8234a(8) =37201a(9) =168388a(10) =774534a(11) =3576978a(12) =16666951a(13) =77997784a(14) =366998557a(15) =1733533658a(16) =8218621913a(17) =39089929073a(18) =186433429979a(19) =891484661419
External references
- oeis: A150525