Half the number of (n+2) X (n+2) binary arrays with each 3 X 3 subblock having sum 3, 4, 5 or 6.
A187308
Half the number of (n+2) X (n+2) binary arrays with each 3 X 3 subblock having sum 3, 4, 5 or 6.
Terms
- a(0) =210a(1) =18792a(2) =5422402a(3) =5243407780
External references
- oeis: A187308