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

A190602

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

Terms

    a(0) =42a(1) =334a(2) =4449a(3) =97424a(4) =3388130a(5) =187160348a(6) =16551136352

External references