Half the number of (n+2) X 3 binary arrays with each 3 X 3 subblock having sum 4 or 5.
A186817
Half the number of (n+2) X 3 binary arrays with each 3 X 3 subblock having sum 4 or 5.
Terms
- a(0) =126a(1) =606a(2) =2904a(3) =14229a(4) =70767a(5) =351549a(6) =1750896a(7) =8730234a(8) =43522407a(9) =217032372a(10) =1082345247a(11) =5397586308a(12) =26918218566a(13) =134243793585a(14) =669486128850
External references
- oeis: A186817