Number of (n+1)X(n+1) symmetric binary matrices without the pattern 1 1 vertically, antidiagonally or horizontally.
A190342
Number of (n+1)X(n+1) symmetric binary matrices without the pattern 1 1 vertically, antidiagonally or horizontally.
Terms
- a(0) =4a(1) =12a(2) =52a(3) =308a(4) =2520a(5) =29268a(6) =471012a(7) =10566004a(8) =331575100a(9) =14510475976a(10) =885694047808
External references
- oeis: A190342