178263

Appears in sequences

• Number of symmetric n X n binary matrices with rows, considered as binary numbers, in strictly increasing order.at n=5A141051
• Number of n X n symmetric binary arrays with rows, considered as binary numbers, in strictly increasing order, and no more than 7 ones in any row.at n=6A162097
• Number of n X n symmetric binary arrays with rows, considered as binary numbers, in strictly increasing order, and no more than 8 ones in any row.at n=6A162098
• Number of n X n symmetric binary arrays with rows, considered as binary numbers, in strictly increasing order, and no more than 9 ones in any row.at n=6A162099