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), (0, -1, 1), (0, 1, 0), (1, 1, 0)}.
A150325
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), (0, -1, 1), (0, 1, 0), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =22a(4) =86a(5) =318a(6) =1302a(7) =5225a(8) =22025a(9) =92511a(10) =398345a(11) =1720291a(12) =7530437a(13) =33120552a(14) =146875126a(15) =654382715a(16) =2931881983a(17) =13189555714a(18) =59582299551a(19) =270075970256
External references
- oeis: A150325