A162121 - OEIS

A162121

Number of n X n binary arrays with rows and columns, considered as graycode numbers, in strictly increasing order, and no more than 4 ones in any row or column

%I #4 Dec 18 2015 18:17:23

%S 2,4,25,408,15142,1005975,101107992,14314188384,2728248222006

%N Number of n X n binary arrays with rows and columns, considered as graycode numbers, in strictly increasing order, and no more than 4 ones in any row or column

%K nonn

%O 1,1

%A _R. H. Hardin_ Jun 25 2009