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, 1), (0, 1, -1), (1, -1, 1), (1, 1, 0)}.
A149412
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, 1), (0, 1, -1), (1, -1, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =12a(4) =52a(5) =200a(6) =906a(7) =3835a(8) =17835a(9) =79215a(10) =374381a(11) =1710234a(12) =8170299a(13) =38011835a(14) =182943410a(15) =862048941a(16) =4171224246a(17) =19838535950a(18) =96382566615a(19) =461629848142
External references
- oeis: A149412