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), (0, -1, 1), (1, 1, -1), (1, 1, 1)}.
A149743
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), (0, -1, 1), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =17a(4) =77a(5) =317a(6) =1417a(7) =6371a(8) =29019a(9) =134117a(10) =623759a(11) =2923269a(12) =13791533a(13) =65305615a(14) =310841939a(15) =1483967601a(16) =7107996949a(17) =34140691615a(18) =164350687661a(19) =792968518081
External references
- oeis: A149743