Least k such that H(k) > 2^n, where H(k) is the harmonic number Sum_{i=1..k} 1/i.

A082913

Least k such that H(k) > 2^n, where H(k) is the harmonic number Sum_{i=1..k} 1/i.

Terms

    a(0) =2a(1) =4a(2) =31a(3) =1674a(4) =4989191

External references