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, 0, 0), (-1, 0, 1), (0, -1, 1), (0, 1, -1), (1, 1, 1)}.
A149766
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, 0, 0), (-1, 0, 1), (0, -1, 1), (0, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =19a(4) =73a(5) =311a(6) =1311a(7) =5649a(8) =24813a(9) =109253a(10) =486623a(11) =2180255a(12) =9810137a(13) =44389337a(14) =201532081a(15) =918049895a(16) =4195559999a(17) =19220439983a(18) =88266951791a(19) =406225389833
External references
- oeis: A149766