Number of (n+2)X(n+2) symmetric binary matrices without the pattern 1 1 1 diagonally or antidiagonally.

A190420

Number of (n+2)X(n+2) symmetric binary matrices without the pattern 1 1 1 diagonally or antidiagonally.

Terms

    a(0) =44a(1) =363a(2) =6072a(3) =191360a(4) =10093200a(5) =935338785a(6) =154543989072

External references