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, 1, -1), (1, 1, 1)}.
A149627
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, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =15a(4) =67a(5) =251a(6) =1111a(7) =4665a(8) =20973a(9) =91881a(10) =418061a(11) =1883901a(12) =8689577a(13) =39803389a(14) =185200353a(15) =859052395a(16) =4030363759a(17) =18861149603a(18) =89009182663a(19) =419555644567
External references
- oeis: A149627