Least number m such that the Sigma-Harmonic sequence Sum_{k=1..m} 1/sigma(k) >= n.
A074468
Least number m such that the Sigma-Harmonic sequence Sum_{k=1..m} 1/sigma(k) >= n.
Terms
- a(0) =1a(1) =7a(2) =29a(3) =129a(4) =571a(5) =2525a(6) =11167a(7) =49372a(8) =218295a(9) =965177a(10) =4267457a(11) =18868240a(12) =83424514a(13) =368855252a(14) =1630865929a(15) =7210751807a(16) =31881800153
External references
- oeis: A074468