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, 0), (0, 1, 0), (1, 1, -1), (1, 1, 1)}.
A150615
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, 0), (0, 1, 0), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =27a(4) =113a(5) =474a(6) =2051a(7) =9054a(8) =40713a(9) =184664a(10) =844547a(11) =3891253a(12) =18059049a(13) =84270068a(14) =394979919a(15) =1858490051a(16) =8777146689a(17) =41589213864a(18) =197626125243a(19) =941429903019
External references
- oeis: A150615