Number of (n+2)X(n+2) symmetric binary matrices without the pattern 0 1 1 vertically, antidiagonally or horizontally.
A190534
Number of (n+2)X(n+2) symmetric binary matrices without the pattern 0 1 1 vertically, antidiagonally or horizontally.
Terms
- a(0) =42a(1) =282a(2) =2156a(3) =22640a(4) =316238a(5) =6107152a(6) =160575506a(7) =5870861789a(8) =297355717075
External references
- oeis: A190534