1/4 the number of (n+1) X 7 binary arrays with equal numbers of 2 X 2 subblocks with sums 1 and 3.

A184601

1/4 the number of (n+1) X 7 binary arrays with equal numbers of 2 X 2 subblocks with sums 1 and 3.

Terms

    a(0) =784a(1) =60569a(2) =6045460a(3) =661355087a(4) =75369979530

External references