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, 1, 0), (0, 1, -1), (1, -1, 1), (1, 0, 1)}.
A149035
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, 1, 0), (0, 1, -1), (1, -1, 1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =10a(4) =34a(5) =135a(6) =534a(7) =2162a(8) =9280a(9) =39708a(10) =172019a(11) =767169a(12) =3419711a(13) =15355346a(14) =70114015a(15) =320273041a(16) =1469955154a(17) =6819015777a(18) =31654184259a(19) =147435154707a(20) =691694048874
External references
- oeis: A149035