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, 0), (0, 1, -1), (1, -1, 1), (1, 1, 0)}.
A149210
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, 0), (0, 1, -1), (1, -1, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =10a(4) =40a(5) =138a(6) =551a(7) =2157a(8) =8810a(9) =36647a(10) =154078a(11) =661375a(12) =2854646a(13) =12490169a(14) =55043299a(15) =244367746a(16) =1093384878a(17) =4915059946a(18) =22237882646a(19) =101035126126a(20) =461173650726
External references
- oeis: A149210