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, 0, 1), (0, 0, 1), (0, 1, -1), (0, 1, 1), (1, -1, 1)}.
A150510
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, 0, 1), (0, 0, 1), (0, 1, -1), (0, 1, 1), (1, -1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =25a(4) =102a(5) =421a(6) =1833a(7) =8055a(8) =36333a(9) =165105a(10) =761383a(11) =3531580a(12) =16531186a(13) =77736848a(14) =367792638a(15) =1746466460a(16) =8329088373a(17) =39838754439a(18) =191165146280a(19) =919486724021
External references
- oeis: A150510