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, 1, 0), (0, 1, -1), (0, 1, 1), (1, 0, 0)}.
A150176
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, 1, 0), (0, 1, -1), (0, 1, 1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =20a(4) =77a(5) =295a(6) =1205a(7) =4978a(8) =21019a(9) =89763a(10) =388922a(11) =1697329a(12) =7471691a(13) =33116255a(14) =147601615a(15) =661139219a(16) =2974954453a(17) =13437851384a(18) =60907445442a(19) =276943253976
External references
- oeis: A150176