Number of (n+1)X(n+1) 0..1 arrays with each 2X2 subblock having clockwise pattern 0000 0011 or 0111.
A259242
Number of (n+1)X(n+1) 0..1 arrays with each 2X2 subblock having clockwise pattern 0000 0011 or 0111.
Terms
- a(0) =9a(1) =65a(2) =720a(3) =14425a(4) =451481a(5) =25462352a(6) =2259371001a(7) =359730429763
External references
- oeis: A259242