Number of nX2 binary arrays with the number of 0-1 adjacencies equal to the number of 0-0 adjacencies.

A183257

Number of nX2 binary arrays with the number of 0-1 adjacencies equal to the number of 0-0 adjacencies.

Terms

    a(0) =1a(1) =5a(2) =5a(3) =22a(4) =59a(5) =220a(6) =696a(7) =2461a(8) =8369a(9) =29428a(10) =102630a(11) =362367a(12) =1279602a(13) =4543607a(14) =16162785a(15) =57675462a(16) =206201571a(17) =738775652a(18) =2651221982a(19) =9529517263a(20) =34299467544a(21) =123610022089a(22) =445975109063

External references