429936domain: NAppears in sequencesHalf the number of n X 3 binary arrays with the number of 1-1 adjacencies equal to the number of 0-0 adjacencies.at n=7A183249T(n,k)=Half the number of nXk binary arrays with the number of 1-1 adjacencies equal to the number of 0-0 adjacencies.at n=47A183253