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), (-1, 0, 0), (0, 1, 1), (1, 0, 0)}.
A149981
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), (-1, 0, 0), (0, 1, 1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =17a(4) =55a(5) =200a(6) =737a(7) =2744a(8) =10651a(9) =41094a(10) =162831a(11) =648037a(12) =2600219a(13) =10552926a(14) =42889495a(15) =176069049a(16) =724424981a(17) =2997115286a(18) =12452594417a(19) =51869668637a(20) =217046091489a(21) =909856059122
External references
- oeis: A149981