Half the number of (n+2)X6 binary arrays with each 3X3 subblock having sum 4 or 5.
A186820
Half the number of (n+2)X6 binary arrays with each 3X3 subblock having sum 4 or 5.
Terms
- a(0) =14229a(1) =173121a(2) =2009622a(3) =24581099a(4) =315843055a(5) =4037185979a(6) =52016332522a(7) =676967599202
External references
- oeis: A186820