A151806 - OEIS

A151806

Number of n X n binary arrays with rows, considered as binary numbers, in strictly increasing order, and columns, considered as binary numbers, in nondecreasing order, and no more than 6 ones in any row or column.

%I #4 Dec 18 2015 18:17:15

%S 2,4,21,330,14610,1820715,608470460,472778135611,730304791620170

%N Number of n X n binary arrays with rows, considered as binary numbers, in strictly increasing order, and columns, considered as binary numbers, in nondecreasing order, and no more than 6 ones in any row or column.

%K nonn

%O 1,1

%A _R. H. Hardin_ Jun 27 2009