Number of n X n symmetric binary arrays with rows, considered as graycode numbers, in nondecreasing order, and no more than 6 ones in any row or column.
A162061
Number of n X n symmetric binary arrays with rows, considered as graycode numbers, in nondecreasing order, and no more than 6 ones in any row or column.
Terms
- a(0) =2a(1) =6a(2) =18a(3) =100a(4) =794a(5) =11268a(6) =252987a(7) =8945756a(8) =446201625a(9) =30067026570
External references
- oeis: A162061