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, 1, 1), (0, 0, -1), (0, 1, 0), (1, 0, 1)}.
A150260
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, 1, 1), (0, 0, -1), (0, 1, 0), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =22a(4) =87a(5) =351a(6) =1453a(7) =6164a(8) =26598a(9) =116082a(10) =511162a(11) =2268857a(12) =10139092a(13) =45562967a(14) =205713249a(15) =932569833a(16) =4242893713a(17) =19365253835a(18) =88635249152a(19) =406706356349
External references
- oeis: A150260