Smallest m such that sigma(m) >= n*m/2.

A383920

Smallest m such that sigma(m) >= n*m/2.

Terms

    a(0) =1a(1) =2a(2) =6a(3) =24a(4) =120a(5) =1680a(6) =27720a(7) =720720a(8) =122522400a(9) =41902660800

External references