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, 0, 1), (1, -1, 0), (1, 1, -1), (1, 1, 1)}.
A149746
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, 0, 1), (1, -1, 0), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =17a(4) =79a(5) =321a(6) =1495a(7) =6573a(8) =31065a(9) =141617a(10) =676833a(11) =3152859a(12) =15182849a(13) =71728255a(14) =347298041a(15) =1656855433a(16) =8054826535a(17) =38702146611a(18) =188738813863a(19) =911762020051
External references
- oeis: A149746