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

A190538

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

Terms

    a(0) =39a(1) =235a(2) =1473a(3) =12123a(4) =126631a(5) =1757318a(6) =32090135a(7) =788075131a(8) =25821271397

External references