A163375 - cp's OEIS frontend

A163375 a(n) = sigma(tau(phi(n))).

n	a(n)
1	1
2	1
3	3
4	3
5	4
6	3
7	7
8	4
9	7
10	4
11	7
12	4
13	12
14	7
15	7
16	7
17	6
18	7
19	12
20	7
21	12
22	7
23	7
24	7
25	12
26	12
27	12
28	12
29	12
30	7
31	15
32	6
33	12
34	6
35	15
36	12
37	13
38	12
39	15
40	6
41	15
42	12
43	15
44	12
45	15
46	7
47	7
48	6
49	15
50	12
51	12
52	15
53	12
54	12
55	15
56	15
57	13
58	12
59	7
60	6
61	28
62	15
63	13
64	12
65	18
66	12
67	15
68	12
69	12
70	15
71	15
72	15

[1, 1, 3, 3, 4, 3, 7, 4, 7, 4, 7, 4, 12, 7, 7, 7, 6, 7, 12, 7, 12, 7, 7, 7, 12, 12, 12, 12, 12, 7, 15, 6, 12, 6, 15, 12, 13, 12, 15, 6, 15, 12, 15, 12, 15, 7, 7, 6, 15, 12, 12, 15, 12, 12, 15, 15, 13, 12, 7, 6, 28, 15, 13, 12, 18, 12, 15, 12, 12, 15, 15, 15]

cp's OEIS Frontend

A163375 a(n) = sigma(tau(phi(n))).

Table of values

List of values

n	a(n)
1	1
2	1
3	3
4	3
5	4
6	3
7	7
8	4
9	7
10	4
11	7
12	4
13	12
14	7
15	7
16	7
17	6
18	7
19	12
20	7
21	12
22	7
23	7
24	7
25	12
26	12
27	12
28	12
29	12
30	7
31	15
32	6
33	12
34	6
35	15
36	12
37	13
38	12
39	15
40	6
41	15
42	12
43	15
44	12
45	15
46	7
47	7
48	6
49	15
50	12
51	12
52	15
53	12
54	12
55	15
56	15
57	13
58	12
59	7
60	6
61	28
62	15
63	13
64	12
65	18
66	12
67	15
68	12
69	12
70	15
71	15
72	15

n	a(n)
1	1
2	1
3	3
4	3
5	4
6	3
7	7
8	4
9	7
10	4
11	7
12	4
13	12
14	7
15	7
16	7
17	6
18	7
19	12
20	7
21	12
22	7
23	7
24	7
25	12
26	12
27	12
28	12
29	12
30	7
31	15
32	6
33	12
34	6
35	15
36	12
37	13
38	12
39	15
40	6
41	15
42	12
43	15
44	12
45	15
46	7
47	7
48	6
49	15
50	12
51	12
52	15
53	12
54	12
55	15
56	15
57	13
58	12
59	7
60	6
61	28
62	15
63	13
64	12
65	18
66	12
67	15
68	12
69	12
70	15
71	15
72	15

n	a(n)
1	1
2	1
3	3
4	3
5	4
6	3
7	7
8	4
9	7
10	4
11	7
12	4
13	12
14	7
15	7
16	7
17	6
18	7
19	12
20	7
21	12
22	7
23	7
24	7
25	12
26	12
27	12
28	12
29	12
30	7
31	15
32	6
33	12
34	6
35	15
36	12
37	13
38	12
39	15
40	6
41	15
42	12
43	15
44	12
45	15
46	7
47	7
48	6
49	15
50	12
51	12
52	15
53	12
54	12
55	15
56	15
57	13
58	12
59	7
60	6
61	28
62	15
63	13
64	12
65	18
66	12
67	15
68	12
69	12
70	15
71	15
72	15