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, 0, 1), (0, 1, 1), (1, 0, -1)}.
A150112
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, 0, 1), (0, 1, 1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =19a(4) =70a(5) =262a(6) =1031a(7) =4153a(8) =17104a(9) =71585a(10) =303758a(11) =1303324a(12) =5645184a(13) =24647181a(14) =108364268a(15) =479285899a(16) =2131180012a(17) =9520717770a(18) =42710777994a(19) =192323297051a(20) =868946783064
External references
- oeis: A150112