Number of length n+3 0..6 arrays with no four elements in a row with pattern abba (possibly a=b) and new values 0..6 introduced in 0..6 order.
A243031
Number of length n+3 0..6 arrays with no four elements in a row with pattern abba (possibly a=b) and new values 0..6 introduced in 0..6 order.
Terms
- a(0) =13a(1) =43a(2) =163a(3) =694a(4) =3251a(5) =16516a(6) =89891a(7) =517995a(8) =3124633a(9) =19526936a(10) =125310013a(11) =819900515a(12) =5439853987a(13) =36450654645a(14) =245947876098
External references
- oeis: A243031