Half the number of (n+2)X4 binary arrays with each 3X3 subblock having a sum in 2..7.
A186789
Half the number of (n+2)X4 binary arrays with each 3X3 subblock having a sum in 2..7.
Terms
- a(0) =1910a(1) =29020a(2) =440505a(3) =6687805a(4) =101532811a(5) =1541462868a(6) =23402344941a(7) =355292192013
External references
- oeis: A186789