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, 0, 1), (0, 1, -1), (1, -1, 0), (1, 1, 1)}.
A149714
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, 0, 1), (0, 1, -1), (1, -1, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =17a(4) =71a(5) =291a(6) =1263a(7) =5545a(8) =24863a(9) =112615a(10) =516095a(11) =2382625a(12) =11078531a(13) =51803127a(14) =243445243a(15) =1148868421a(16) =5442173607a(17) =25863234031a(18) =123268672809a(19) =589036267603
External references
- oeis: A149714