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), (0, -1, 1), (1, 1, 0)}.
A149133
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), (0, -1, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =9a(4) =34a(5) =108a(6) =384a(7) =1393a(8) =5052a(9) =19274a(10) =72492a(11) =279750a(12) =1086242a(13) =4247496a(14) =16821326a(15) =66588371a(16) =266382250a(17) =1068490882a(18) =4310377288a(19) =17459435294a(20) =70899996890a(21) =289237844606
External references
- oeis: A149133