Half the number of (n+2) X 3 binary arrays with each 3 X 3 subblock having a sum in 2..7.
A186788
Half the number of (n+2) X 3 binary arrays with each 3 X 3 subblock having a sum in 2..7.
Terms
- a(0) =246a(1) =1910a(2) =14825a(3) =115069a(4) =893145a(5) =6932452a(6) =53808589a(7) =417653681a(8) =3241761282a(9) =25162034228a(10) =195303697871
External references
- oeis: A186788