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

A190536

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

Terms

    a(0) =56a(1) =528a(2) =6600a(3) =100980a(4) =2117870a(5) =61630794a(6) =2607217770a(7) =156166134300

External references