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), (0, -1, 1), (0, 1, -1), (1, 1, 1)}.
A149692
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), (0, -1, 1), (0, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =17a(4) =67a(5) =273a(6) =1145a(7) =4841a(8) =21091a(9) =91859a(10) =406099a(11) =1807315a(12) =8084337a(13) =36404949a(14) =164593133a(15) =747068939a(16) =3403883837a(17) =15552670495a(18) =71263992961a(19) =327354935635
External references
- oeis: A149692