Half the number of nX4 binary arrays with the number of 1-1 adjacencies equal to the number of 0-0 adjacencies.
A183250
Half the number of nX4 binary arrays with the number of 1-1 adjacencies equal to the number of 0-0 adjacencies.
Terms
- a(0) =2a(1) =18a(2) =164a(3) =2101a(4) =29100a(5) =417190a(6) =6104168a(7) =90554742a(8) =1356933444a(9) =20489622108a(10) =311268434796
External references
- oeis: A183250