Number of length n+3 0..n arrays with no four elements in a row with pattern aabb (with a!=b) and new values 0..n introduced in 0..n order.
A242577
Number of length n+3 0..n arrays with no four elements in a row with pattern aabb (with a!=b) and new values 0..n introduced in 0..n order.
Terms
- a(0) =7a(1) =35a(2) =159a(3) =723a(4) =3453a(5) =17634a(6) =96472a(7) =563256a(8) =3492837a(9) =22901243a(10) =158134009a(11) =1145995500a(12) =8690227115a(13) =68774540753a(14) =566710394107
External references
- oeis: A242577