Number of n X n nonnegative integer matrices with row and column i=1..n having sum <= i*2.
A214006
Number of n X n nonnegative integer matrices with row and column i=1..n having sum <= i*2.
Terms
- a(0) =3a(1) =54a(2) =7722a(3) =9318805a(4) =98721672541
External references
- oeis: A214006