a(n) = smallest m >= 2 such that Sum_{k=2..m} 1/(k*log(k)) >= n.

A096580

a(n) = smallest m >= 2 such that Sum_{k=2..m} 1/(k*log(k)) >= n.

Terms

    a(0) =2a(1) =3a(2) =28a(3) =8718a(4) =51426757439

External references