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, 1), (0, 1, -1), (1, -1, 1), (1, 1, 1)}.
A149736
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, 1), (0, 1, -1), (1, -1, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =17a(4) =75a(5) =309a(6) =1427a(7) =6225a(8) =29329a(9) =132983a(10) =633231a(11) =2930825a(12) =14080685a(13) =66112471a(14) =319337149a(15) =1514960079a(16) =7349885503a(17) =35129344557a(18) =170998060713a(19) =822128939475
External references
- oeis: A149736