Half the number of (n+1) X 4 binary arrays with equal numbers of majority one 2 X 2 subblocks and majority zero 2 X 2 subblocks.

A184461

Half the number of (n+1) X 4 binary arrays with equal numbers of majority one 2 X 2 subblocks and majority zero 2 X 2 subblocks.

Terms

    a(0) =26a(1) =244a(2) =3090a(3) =42874a(4) =616534a(5) =9016218a(6) =133687638a(7) =2002023718a(8) =30215911640a(9) =458822048550

External references