A173242 Partial sums of A027642.

1, 3, 9, 10, 40, 41, 83, 84, 114, 115, 181, 182, 2912, 2913, 2919, 2920, 3430, 3431, 4229, 4230, 4560, 4561, 4699, 4700, 7430, 7431, 7437, 7438, 8308, 8309, 22631, 22632, 23142, 23143, 23149, 23150, 1942340, 1942341, 1942347, 1942348, 1955878

Offset: 0

Author

Jonathan Vos Post, Feb 13 2010

Keywords

• nonn

Crossrefs

Cf. A027642.

Programs

PARI

a(n) = sum(k=0, n, denominator(bernfrac(k))); \\ Michel Marcus, Aug 28 2020

Formula

a(n) = Sum_{i=0..n} A027642(i).

Extensions

a(19) corrected by Georg Fischer, Aug 28 2020