Number of n X n symmetric binary arrays with rows, considered as binary numbers, in nondecreasing order, and no more than 4 ones in any row.

A162038

Number of n X n symmetric binary arrays with rows, considered as binary numbers, in nondecreasing order, and no more than 4 ones in any row.

Terms

    a(0) =2a(1) =5a(2) =17a(3) =86a(4) =612a(5) =5468a(6) =62853a(7) =856193a(8) =13518083a(9) =243899329a(10) =4944615404a(11) =111381110541

External references