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, 0), (-1, 1, 0), (1, -1, 1), (1, 0, 0)}.
A148180
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, 0), (-1, 1, 0), (1, -1, 1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =12a(5) =28a(6) =92a(7) =251a(8) =860a(9) =2513a(10) =9147a(11) =28003a(12) =104286a(13) =332940a(14) =1264621a(15) =4143576a(16) =16059654a(17) =53812043a(18) =210796710a(19) =719697420a(20) =2851086259a(21) =9873316114a(22) =39477178907a(23) =138480427194a(24) =557399401255
External references
- oeis: A148180