Half the number of nX4 binary arrays with no element equal to a strict majority of its horizontal and vertical neighbors.

A183305

Half the number of nX4 binary arrays with no element equal to a strict majority of its horizontal and vertical neighbors.

Terms

    a(0) =2a(1) =6a(2) =19a(3) =55a(4) =178a(5) =572a(6) =1798a(7) =5700a(8) =18064a(9) =57249a(10) =181433a(11) =574924a(12) =1821857a(13) =5773450a(14) =18295845a(15) =57978643a(16) =183731482a(17) =582236576a(18) =1845081304a(19) =5846978390a(20) =18528805856a(21) =58716935815a(22) =186071279593a(23) =589651361292

External references