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, 0, 1), (-1, 1, 1), (1, -1, 0), (1, 0, -1), (1, 1, 1)}.
A149804
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, 0, 1), (-1, 1, 1), (1, -1, 0), (1, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =19a(4) =89a(5) =379a(6) =1823a(7) =8197a(8) =40045a(9) =185935a(10) =914769a(11) =4333969a(12) =21414917a(13) =102774477a(14) =509373665a(15) =2466218669a(16) =12248424895a(17) =59682477719a(18) =296839596157
External references
- oeis: A149804