Number of (n+2)X(n+2) symmetric binary matrices without the pattern 0 1 1 vertically or horizontally.

A190533

Number of (n+2)X(n+2) symmetric binary matrices without the pattern 0 1 1 vertically or horizontally.

Terms

    a(0) =42a(1) =332a(2) =3660a(3) =59408a(4) =1405148a(5) =49455712a(6) =2586803564a(7) =202549927174

External references