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, 0), (1, 0, 0), (1, 1, -1), (1, 1, 1)}.
A150782
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, 0), (1, 0, 0), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =30a(4) =134a(5) =563a(6) =2610a(7) =11570a(8) =54609a(9) =249476a(10) =1191209a(11) =5545982a(12) =26685261a(13) =125844944a(14) =608851334a(15) =2898027333a(16) =14078991088a(17) =67481610993a(18) =328888543542
External references
- oeis: A150782