Half the number of (n+2)X6 binary arrays with each 3X3 subblock having a sum in 2..7.
A186791
Half the number of (n+2)X6 binary arrays with each 3X3 subblock having a sum in 2..7.
Terms
- a(0) =115069a(1) =6687805a(2) =387763760a(3) =22495797451
External references
- oeis: A186791