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, 0), (0, 1, 1), (1, 0, 1), (1, 1, 0)}.
A151146
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, 0), (0, 1, 1), (1, 0, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =3a(2) =11a(3) =47a(4) =205a(5) =923a(6) =4217a(7) =19581a(8) =91807a(9) =433555a(10) =2059857a(11) =9835035a(12) =47163341a(13) =226918347a(14) =1094938161a(15) =5296570431a(16) =25678626943a(17) =124732816173a(18) =606894354995
External references
- oeis: A151146