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), (0, -1, 1), (0, 1, 0), (0, 1, 1), (1, 0, -1)}.
A150472
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), (0, -1, 1), (0, 1, 0), (0, 1, 1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =25a(4) =99a(5) =403a(6) =1719a(7) =7451a(8) =33116a(9) =148742a(10) =678430a(11) =3117059a(12) =14468349a(13) =67515160a(14) =317323787a(15) =1497442597a(16) =7103751478a(17) =33805337279a(18) =161517974750a(19) =773643738505
External references
- oeis: A150472