Number of (n+2)X(n+2) binary arrays with each 3X3 subblock having a positive determinant.
A186054
Number of (n+2)X(n+2) binary arrays with each 3X3 subblock having a positive determinant.
Terms
- a(0) =87a(1) =1217a(2) =26868a(3) =836891a(4) =58408337a(5) =6541274560
External references
- oeis: A186054