A151948 - cp's OEIS frontend

A151948 a(n) = tau(sigma(phi(n))).

n	a(n)
1	1
2	1
3	2
4	2
5	2
6	2
7	6
8	2
9	6
10	2
11	6
12	2
13	6
14	6
15	4
16	4
17	2
18	6
19	4
20	4
21	6
22	6
23	9
24	4
25	8
26	6
27	4
28	6
29	8
30	4
31	12
32	2
33	8
34	2
35	12
36	6
37	4
38	4
39	12
40	2
41	12
42	6
43	12
44	8
45	12
46	9
47	12
48	2
49	12
50	8
51	6
52	12
53	6
54	4
55	12
56	12
57	4
58	8
59	12
60	2
61	16
62	12
63	4
64	6
65	6
66	8
67	15
68	6
69	12
70	12
71	15
72	12
73	8
74	4
75	12
76	4
77	16
78	12
79	16

[1, 1, 2, 2, 2, 2, 6, 2, 6, 2, 6, 2, 6, 6, 4, 4, 2, 6, 4, 4, 6, 6, 9, 4, 8, 6, 4, 6, 8, 4, 12, 2, 8, 2, 12, 6, 4, 4, 12, 2, 12, 6, 12, 8, 12, 9, 12, 2, 12, 8, 6, 12, 6, 4, 12, 12, 4, 8, 12, 2, 16, 12, 4, 6, 6, 8, 15, 6, 12, 12, 15, 12, 8, 4, 12, 4, 16, 12, 16]

cp's OEIS Frontend

A151948 a(n) = tau(sigma(phi(n))).

Table of values

List of values

n	a(n)
1	1
2	1
3	2
4	2
5	2
6	2
7	6
8	2
9	6
10	2
11	6
12	2
13	6
14	6
15	4
16	4
17	2
18	6
19	4
20	4
21	6
22	6
23	9
24	4
25	8
26	6
27	4
28	6
29	8
30	4
31	12
32	2
33	8
34	2
35	12
36	6
37	4
38	4
39	12
40	2
41	12
42	6
43	12
44	8
45	12
46	9
47	12
48	2
49	12
50	8
51	6
52	12
53	6
54	4
55	12
56	12
57	4
58	8
59	12
60	2
61	16
62	12
63	4
64	6
65	6
66	8
67	15
68	6
69	12
70	12
71	15
72	12
73	8
74	4
75	12
76	4
77	16
78	12
79	16

n	a(n)
1	1
2	1
3	2
4	2
5	2
6	2
7	6
8	2
9	6
10	2
11	6
12	2
13	6
14	6
15	4
16	4
17	2
18	6
19	4
20	4
21	6
22	6
23	9
24	4
25	8
26	6
27	4
28	6
29	8
30	4
31	12
32	2
33	8
34	2
35	12
36	6
37	4
38	4
39	12
40	2
41	12
42	6
43	12
44	8
45	12
46	9
47	12
48	2
49	12
50	8
51	6
52	12
53	6
54	4
55	12
56	12
57	4
58	8
59	12
60	2
61	16
62	12
63	4
64	6
65	6
66	8
67	15
68	6
69	12
70	12
71	15
72	12
73	8
74	4
75	12
76	4
77	16
78	12
79	16

n	a(n)
1	1
2	1
3	2
4	2
5	2
6	2
7	6
8	2
9	6
10	2
11	6
12	2
13	6
14	6
15	4
16	4
17	2
18	6
19	4
20	4
21	6
22	6
23	9
24	4
25	8
26	6
27	4
28	6
29	8
30	4
31	12
32	2
33	8
34	2
35	12
36	6
37	4
38	4
39	12
40	2
41	12
42	6
43	12
44	8
45	12
46	9
47	12
48	2
49	12
50	8
51	6
52	12
53	6
54	4
55	12
56	12
57	4
58	8
59	12
60	2
61	16
62	12
63	4
64	6
65	6
66	8
67	15
68	6
69	12
70	12
71	15
72	12
73	8
74	4
75	12
76	4
77	16
78	12
79	16