Half the number of (n+2)X(n+2) binary arrays with each 3X3 subblock having a sum in 2..7.
A186787
Half the number of (n+2)X(n+2) binary arrays with each 3X3 subblock having a sum in 2..7.
Terms
- a(0) =246a(1) =29020a(2) =13066921a(3) =22495797451
External references
- oeis: A186787