A162093 - OEIS

A162093

Number of n X n symmetric binary arrays with rows, considered as binary numbers, in strictly increasing order, and no more than 3 ones in any row.

%I #8 Oct 02 2025 23:18:19

%S 2,3,9,41,205,1190,7529,51751,387737,3113542,26765060,244702054,

%T 2367701249,24169612036,259289525510,2915165124175,34258966408875

%N Number of n X n symmetric binary arrays with rows, considered as binary numbers, in strictly increasing order, and no more than 3 ones in any row.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jun 25 2009