A068340 - cp's OEIS frontend

A068340 a(n) = Sum_{k=1..n} mu(k)*k, where mu(k) is the Moebius function.

n	a(n)
1	1
2	-1
3	-4
4	-4
5	-9
6	-3
7	-10
8	-10
9	-10
10	0
11	-11
12	-11
13	-24
14	-10
15	5
16	5
17	-12
18	-12
19	-31
20	-31
21	-10
22	12
23	-11
24	-11
25	-11
26	15
27	15
28	15
29	-14
30	-44
31	-75
32	-75
33	-42
34	-8
35	27
36	27
37	-10
38	28
39	67
40	67
41	26
42	-16
43	-59
44	-59
45	-59
46	-13
47	-60
48	-60
49	-60
50	-60
51	-9
52	-9
53	-62
54	-62
55	-7
56	-7
57	50
58	108
59	49

[1, -1, -4, -4, -9, -3, -10, -10, -10, 0, -11, -11, -24, -10, 5, 5, -12, -12, -31, -31, -10, 12, -11, -11, -11, 15, 15, 15, -14, -44, -75, -75, -42, -8, 27, 27, -10, 28, 67, 67, 26, -16, -59, -59, -59, -13, -60, -60, -60, -60, -9, -9, -62, -62, -7, -7, 50, 108, 49]

cp's OEIS Frontend

A068340 a(n) = Sum_{k=1..n} mu(k)*k, where mu(k) is the Moebius function.

Table of values

List of values

n	a(n)
1	1
2	-1
3	-4
4	-4
5	-9
6	-3
7	-10
8	-10
9	-10
10	0
11	-11
12	-11
13	-24
14	-10
15	5
16	5
17	-12
18	-12
19	-31
20	-31
21	-10
22	12
23	-11
24	-11
25	-11
26	15
27	15
28	15
29	-14
30	-44
31	-75
32	-75
33	-42
34	-8
35	27
36	27
37	-10
38	28
39	67
40	67
41	26
42	-16
43	-59
44	-59
45	-59
46	-13
47	-60
48	-60
49	-60
50	-60
51	-9
52	-9
53	-62
54	-62
55	-7
56	-7
57	50
58	108
59	49

n	a(n)
1	1
2	-1
3	-4
4	-4
5	-9
6	-3
7	-10
8	-10
9	-10
10	0
11	-11
12	-11
13	-24
14	-10
15	5
16	5
17	-12
18	-12
19	-31
20	-31
21	-10
22	12
23	-11
24	-11
25	-11
26	15
27	15
28	15
29	-14
30	-44
31	-75
32	-75
33	-42
34	-8
35	27
36	27
37	-10
38	28
39	67
40	67
41	26
42	-16
43	-59
44	-59
45	-59
46	-13
47	-60
48	-60
49	-60
50	-60
51	-9
52	-9
53	-62
54	-62
55	-7
56	-7
57	50
58	108
59	49

n	a(n)
1	1
2	-1
3	-4
4	-4
5	-9
6	-3
7	-10
8	-10
9	-10
10	0
11	-11
12	-11
13	-24
14	-10
15	5
16	5
17	-12
18	-12
19	-31
20	-31
21	-10
22	12
23	-11
24	-11
25	-11
26	15
27	15
28	15
29	-14
30	-44
31	-75
32	-75
33	-42
34	-8
35	27
36	27
37	-10
38	28
39	67
40	67
41	26
42	-16
43	-59
44	-59
45	-59
46	-13
47	-60
48	-60
49	-60
50	-60
51	-9
52	-9
53	-62
54	-62
55	-7
56	-7
57	50
58	108
59	49