Number of (n+1)X(n+1) 0..1 arrays with every 2X2 subblock having one or two 1s.
A251318
Number of (n+1)X(n+1) 0..1 arrays with every 2X2 subblock having one or two 1s.
Terms
- a(0) =10a(1) =116a(2) =2804a(3) =157312a(4) =18415674a(5) =4911447738
External references
- oeis: A251318