Half the number of (n+2)X7 binary arrays with each 3X3 subblock having a sum in 2..7.
A186792
Half the number of (n+2)X7 binary arrays with each 3X3 subblock having a sum in 2..7.
Terms
- a(0) =893145a(1) =101532811a(2) =11506373601
External references
- oeis: A186792