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, 0), (0, -1, 1), (0, 0, 1), (0, 1, -1), (1, 1, 0)}.
A150612
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, 0), (0, -1, 1), (0, 0, 1), (0, 1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =27a(4) =112a(5) =477a(6) =2118a(7) =9510a(8) =43614a(9) =201517a(10) =942815a(11) =4432835a(12) =21013136a(13) =99957322a(14) =478180218a(15) =2293491483a(16) =11045190763a(17) =53298966235a(18) =257981267156
External references
- oeis: A150612