A176708 Partial sums of A094820.

1, 3, 6, 11, 17, 25, 34, 45, 58, 73, 89, 108, 128, 150, 174, 201, 229, 260, 292, 327, 364, 403, 443, 487, 533, 581, 631, 684, 738, 796, 855, 917, 981, 1047, 1115, 1188, 1262, 1338, 1416, 1498, 1581, 1668, 1756, 1847, 1941, 2037, 2134, 2236, 2340, 2447, 2556

Offset

1,2

Links

Table of n, a(n) for n=1..51.

Prog

(PARI) f(n) = sum(k=1, n, ceil(numdiv(k)/2)); \\ A094820
a(n) = sum(k=1, n, f(k)); \\ Michel Marcus, Sep 29 2021

Crossrefs

Cf. A038548, A094820.

Sequence in context: A025743 A022338 A263807 * A273140 A320272 A119639

Adjacent sequences: A176705 A176706 A176707 * A176709 A176710 A176711

Keyword

easy,nonn

Author

Jonathan Vos Post, Apr 24 2010

Extensions

a(2) corrected by Georg Fischer, Sep 29 2021

Status

approved