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), (1, 0, 1), (1, 1, -1), (1, 1, 0)}.
A150785
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), (1, 0, 1), (1, 1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =30a(4) =135a(5) =579a(6) =2723a(7) =12339a(8) =59277a(9) =276665a(10) =1345269a(11) =6393287a(12) =31322030a(13) =150637188a(14) =741700919a(15) =3596682654a(16) =17770927067a(17) =86693084805a(18) =429420886016
External references
- oeis: A150785