A346597 Partial sums of A019554.

1, 3, 6, 8, 13, 19, 26, 30, 33, 43, 54, 60, 73, 87, 102, 106, 123, 129, 148, 158, 179, 201, 224, 236, 241, 267, 276, 290, 319, 349, 380, 388, 421, 455, 490, 496, 533, 571, 610, 630, 671, 713, 756, 778, 793, 839, 886, 898, 905, 915, 966, 992, 1045, 1063, 1118, 1146, 1203, 1261, 1320, 1350, 1411

Offset

1,2

Links

Amiram Eldar, Table of n, a(n) for n = 1..10000

Formula

a(n) = Sum_{k=1..n} A019554(k) ~ 3*zeta(3)*n^2 / Pi^2. - Vaclav Kotesovec, Sep 18 2020 [Copied from A019554]

Prog

(PARI) a(n) = sum(k=1, n, k/core(k, 1)[2]); \\ Michel Marcus, Jul 27 2021

Crossrefs

Cf. A019554.

Sequence in context: A090961 A073355 A067440 * A108161 A263349 A352319

Adjacent sequences: A346594 A346595 A346596 * A346598 A346599 A346600

Keyword

nonn

Author

N. J. A. Sloane, Jul 27 2021

Status

approved