Number of n X n symmetric binary arrays with rows, considered as binary numbers, in nondecreasing order, and all but the outermost 4 rows or columns zero.

A162030

Number of n X n symmetric binary arrays with rows, considered as binary numbers, in nondecreasing order, and all but the outermost 4 rows or columns zero.

Terms

    a(0) =9471845a(1) =370995866a(2) =12256154479a(3) =374124492162

External references