Half the number of (n+1) X 7 0..2 arrays with every 2 X 2 subblock having exactly two distinct clockwise edge differences.

A209532

Half the number of (n+1) X 7 0..2 arrays with every 2 X 2 subblock having exactly two distinct clockwise edge differences.

Terms

    a(0) =129a(1) =1537a(2) =16385a(3) =196609a(4) =2097153a(5) =25165825a(6) =268435457a(7) =3221225473a(8) =34359738369a(9) =412316860417

External references