Number of length n+2 0..n arrays with no three elements in a row with pattern aba (with a!=b) and new values 0..n introduced in 0..n order.
A243599
Number of length n+2 0..n arrays with no three elements in a row with pattern aba (with a!=b) and new values 0..n introduced in 0..n order.
Terms
- a(0) =3a(1) =9a(2) =28a(3) =96a(4) =365a(5) =1533a(6) =7049a(7) =35166a(8) =188834a(9) =1084179a(10) =6618471a(11) =42756207a(12) =291120550a(13) =2081922514a(14) =15590248867a(15) =121920095673a(16) =993343650911
External references
- oeis: A243599