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

A190607

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

Terms

    a(0) =34a(1) =168a(2) =1135a(3) =12814a(4) =224705a(5) =5127157a(6) =154820497a(7) =6857389175a(8) =450847078335

External references