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, 0, 1), (0, 1, 1), (1, -1, 1), (1, 0, -1)}.
A149037
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, 0, 1), (0, 1, 1), (1, -1, 1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =10a(4) =35a(5) =128a(6) =507a(7) =2018a(8) =8233a(9) =34330a(10) =144621a(11) =616132a(12) =2653433a(13) =11506566a(14) =50254573a(15) =220854412a(16) =975469382a(17) =4328974934a(18) =19292389001a(19) =86294255900a(20) =387314440619
External references
- oeis: A149037