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, 0, 0), (1, 0, 1), (1, 1, -1)}.
A150535
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, 0, 0), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =25a(4) =111a(5) =471a(6) =2205a(7) =9946a(8) =47847a(9) =223201a(10) =1088255a(11) =5176469a(12) =25438052a(13) =122515846a(14) =605030485a(15) =2938689467a(16) =14559218790a(17) =71139221518a(18) =353227109342
External references
- oeis: A150535