A072980 - cp's OEIS frontend

A072980 Numerator of b(n) = Sum_{k'<=n} 1/k', where k' denotes the squarefree numbers.

n	a(n)
1	1
2	3
3	11
4	11
5	61
6	11
7	82
8	82
9	82
10	171
11	1951
12	1951
13	26133
14	13424
15	41273
16	41273
17	716656
18	716656
19	13871719
20	13871719
21	4700888
22	9548741
23	222854273
24	222854273
25	222854273
26	112857219
27	112857219
28	112857219
29	3310041496
30	20075905417

[1, 3, 11, 11, 61, 11, 82, 82, 82, 171, 1951, 1951, 26133, 13424, 41273, 41273, 716656, 716656, 13871719, 13871719, 4700888, 9548741, 222854273, 222854273, 222854273, 112857219, 112857219, 112857219, 3310041496, 20075905417]

cp's OEIS Frontend

A072980 Numerator of b(n) = Sum_{k'<=n} 1/k', where k' denotes the squarefree numbers.

Table of values

List of values