Number of (n+2)X(n+2) binary arrays with 3X3 subblock sums nondecreasing rightwards and downwards.

A186831

Number of (n+2)X(n+2) binary arrays with 3X3 subblock sums nondecreasing rightwards and downwards.

Terms

    a(0) =512a(1) =19904a(2) =1537476a(3) =209888936a(4) =21242244160

External references