Number of length n+3 0..4 arrays with no four elements in a row with pattern abab (with a!=b) and new values 0..4 introduced in 0..4 order.
A243040
Number of length n+3 0..4 arrays with no four elements in a row with pattern abab (with a!=b) and new values 0..4 introduced in 0..4 order.
Terms
- a(0) =14a(1) =47a(2) =178a(3) =738a(4) =3255a(5) =14932a(6) =70167a(7) =334488a(8) =1608035a(9) =7768793a(10) =37640892a(11) =182680585a(12) =887456524a(13) =4313673443a(14) =20974431432a(15) =102003754546a(16) =496124206009
External references
- oeis: A243040