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), (1, -1, 0), (1, 1, 0)}.
A149204
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), (1, -1, 0), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =10a(4) =40a(5) =129a(6) =536a(7) =1975a(8) =8423a(9) =33404a(10) =145751a(11) =604715a(12) =2689741a(13) =11503325a(14) =51952938a(15) =227164465a(16) =1038263018a(17) =4617993479a(18) =21307484694a(19) =96064792362a(20) =446674790275
External references
- oeis: A149204