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, 0, -1), (1, 0, 1), (1, 1, -1)}.
A149405
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, 0, -1), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =12a(4) =52a(5) =185a(6) =835a(7) =3281a(8) =15158a(9) =63309a(10) =296887a(11) =1289845a(12) =6111674a(13) =27277697a(14) =130232632a(15) =592619901a(16) =2845730366a(17) =13138353029a(18) =63376378401a(19) =295889267987
External references
- oeis: A149405