Number of length n+3 0..n arrays with no four elements in a row with pattern aabb (possibly a=b) and new values 0..n introduced in 0..n order.
A242542
Number of length n+3 0..n arrays with no four elements in a row with pattern aabb (possibly a=b) and new values 0..n introduced in 0..n order.
Terms
- a(0) =6a(1) =32a(2) =150a(3) =690a(4) =3311a(5) =16968a(6) =93103a(7) =544920a(8) =3386262a(9) =22243902a(10) =153850981a(11) =1116625523a(12) =8478969009a(13) =67185160511a(14) =554235206898
External references
- oeis: A242542