A174112 After correction, duplicate of A111490.

1, 2, 4, 5, 9, 9, 15, 16, 21, 23, 33, 29, 41, 45, 51, 52, 68, 65, 83, 81, 91, 99, 121, 109, 128, 138, 152, 152, 180, 168, 198, 199, 217, 231, 253, 234, 270, 286, 308, 298, 338, 326, 368

Offset: 1

Author

Keywords

• dead

Formula

a(n) = Sum_{i=1..n} A033879(i) = Sum_{i=1..n} (2*i - (sum of divisors of i)) = Sum_{i=1..n} (A005843(i)-A000203(i) = Sum_{i=1..n}(A005843(i) - Sum{i=1..n} A000203(i).