Number of length n+2 0..6 arrays with no three elements in a row with pattern aba or abb (with a!=b) and new values 0..6 introduced in 0..6 order.
A243515
Number of length n+2 0..6 arrays with no three elements in a row with pattern aba or abb (with a!=b) and new values 0..6 introduced in 0..6 order.
Terms
- a(0) =3a(1) =5a(2) =10a(3) =25a(4) =77a(5) =279a(6) =1134a(7) =4979a(8) =22981a(9) =109453a(10) =531458a(11) =2610933a(12) =12917685a(13) =64181627a(14) =319695982a(15) =1594859887a(16) =7963472189a(17) =39784944801a(18) =198827606706a(19) =993846943841
External references
- oeis: A243515