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, 0, 1), (1, -1, 0), (1, 0, 1), (1, 1, -1)}.
A149006
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, 0, 1), (1, -1, 0), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =9a(4) =34a(5) =120a(6) =483a(7) =1882a(8) =7858a(9) =32229a(10) =138321a(11) =585584a(12) =2560197a(13) =11082844a(14) =49100853a(15) =215982063a(16) =966695396a(17) =4303305428a(18) =19415733580a(19) =87237177735a(20) =396131418000
External references
- oeis: A149006