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, 0), (1, 0, -1), (1, 0, 1), (1, 1, -1)}.
A149360
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, 0), (1, 0, -1), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =12a(4) =44a(5) =155a(6) =615a(7) =2411a(8) =9970a(9) =40891a(10) =174401a(11) =740721a(12) =3229916a(13) =14042215a(14) =62258717a(15) =275471949a(16) =1237417112a(17) =5550593831a(18) =25195430116a(19) =114255398662a(20) =523102262154
External references
- oeis: A149360