Number of length n+2 0..9 arrays with no three elements in a row with pattern aba or abb (with a!=b) and new values 0..9 introduced in 0..9 order.
A243518
Number of length n+2 0..9 arrays with no three elements in a row with pattern aba or abb (with a!=b) and new values 0..9 introduced in 0..9 order.
Terms
- a(0) =3a(1) =5a(2) =10a(3) =25a(4) =77a(5) =280a(6) =1157a(7) =5297a(8) =26443a(9) =142372a(10) =819731a(11) =5009281a(12) =32252381a(13) =217194296a(14) =1518771097a(15) =10952508217a(16) =80950970231a(17) =609958242292
External references
- oeis: A243518