a(n) = Sum_{k = 1..10^n} d(k) where d(n) = number of divisors of n (A000005).
A057494
a(n) = Sum_{k = 1..10^n} d(k) where d(n) = number of divisors of n (A000005).
Terms
- a(0) =1a(1) =27a(2) =482a(3) =7069a(4) =93668a(5) =1166750a(6) =13970034a(7) =162725364a(8) =1857511568a(9) =20877697634a(10) =231802823220
External references
- oeis: A057494