A367866 - cp's OEIS frontend

A367866 a(n) = Sum_{d|n} d * sigma(d) * mu(d)^2.

n	a(n)
1	1
2	7
3	13
4	7
5	31
6	91
7	57
8	7
9	13
10	217
11	133
12	91
13	183
14	399
15	403
16	7
17	307
18	91
19	381
20	217
21	741
22	931
23	553
24	91
25	31
26	1281
27	13
28	399
29	871
30	2821
31	993
32	7
33	1729
34	2149
35	1767
36	91
37	1407
38	2667
39	2379
40	217
41	1723
42	5187
43	1893
44	931
45	403
46	3871
47	2257
48	91
49	57
50	217
51	3991
52	1281
53	2863
54	91

[1, 7, 13, 7, 31, 91, 57, 7, 13, 217, 133, 91, 183, 399, 403, 7, 307, 91, 381, 217, 741, 931, 553, 91, 31, 1281, 13, 399, 871, 2821, 993, 7, 1729, 2149, 1767, 91, 1407, 2667, 2379, 217, 1723, 5187, 1893, 931, 403, 3871, 2257, 91, 57, 217, 3991, 1281, 2863, 91]

cp's OEIS Frontend

A367866 a(n) = Sum_{d|n} d * sigma(d) * mu(d)^2.

Table of values

List of values