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, 1), (0, 1, -1), (1, 0, 0), (1, 0, 1)}.
A150393
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, 1), (0, 1, -1), (1, 0, 0), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =24a(4) =90a(5) =361a(6) =1467a(7) =6228a(8) =26685a(9) =116295a(10) =515285a(11) =2297850a(12) =10381454a(13) =47140567a(14) =215572145a(15) =992487194a(16) =4586657093a(17) =21320447629a(18) =99417329814a(19) =465335801616
External references
- oeis: A150393