Number of n X n symmetric binary arrays with rows, considered as graycode numbers, in nondecreasing order, and no more than 9 ones in any row or column.
A162064
Number of n X n symmetric binary arrays with rows, considered as graycode numbers, in nondecreasing order, and no more than 9 ones in any row or column.
Terms
- a(0) =2a(1) =6a(2) =18a(3) =100a(4) =794a(5) =11268a(6) =264083a(7) =11030649a(8) =813916625a(9) =107746920222
External references
- oeis: A162064