A387156 - cp's OEIS frontend

A387156 a(n) = A003557(sigma(n)), where A003557(n) is multiplicative with a(p^e) = p^(e-1), and sigma is the sum of divisors function.

n	a(n)
1	1
2	1
3	2
4	1
5	1
6	2
7	4
8	1
9	1
10	3
11	2
12	2
13	1
14	4
15	4
16	1
17	3
18	1
19	2
20	1
21	16
22	6
23	4
24	2
25	1
26	1
27	4
28	4
29	1
30	12
31	16
32	3
33	8
34	9
35	8
36	1
37	1
38	2
39	4
40	3
41	1
42	16
43	2
44	2
45	1
46	12
47	8
48	2
49	1
50	1
51	12
52	7
53	9
54	4
55	12
56	4
57	8
58	3
59	2
60	4
61	1
62	16
63	4
64	1
65	2
66	24
67	2
68	3
69	16
70	24
71	12
72	1
73	1
74	1
75	2
76	2
77	16
78	4
79	8
80	1
81	11
82	3
83	2
84	16
85	18
86	2
87	4
88	6
89	3
90	3
91	8
92	4
93	64
94	24
95	4
96	6
97	7
98	3
99	2

[1, 1, 2, 1, 1, 2, 4, 1, 1, 3, 2, 2, 1, 4, 4, 1, 3, 1, 2, 1, 16, 6, 4, 2, 1, 1, 4, 4, 1, 12, 16, 3, 8, 9, 8, 1, 1, 2, 4, 3, 1, 16, 2, 2, 1, 12, 8, 2, 1, 1, 12, 7, 9, 4, 12, 4, 8, 3, 2, 4, 1, 16, 4, 1, 2, 24, 2, 3, 16, 24, 12, 1, 1, 1, 2, 2, 16, 4, 8, 1, 11, 3, 2, 16, 18, 2, 4, 6, 3, 3, 8, 4, 64, 24, 4, 6, 7, 3, 2]

cp's OEIS Frontend

A387156 a(n) = A003557(sigma(n)), where A003557(n) is multiplicative with a(p^e) = p^(e-1), and sigma is the sum of divisors function.

Table of values

List of values

n	a(n)
1	1
2	1
3	2
4	1
5	1
6	2
7	4
8	1
9	1
10	3
11	2
12	2
13	1
14	4
15	4
16	1
17	3
18	1
19	2
20	1
21	16
22	6
23	4
24	2
25	1
26	1
27	4
28	4
29	1
30	12
31	16
32	3
33	8
34	9
35	8
36	1
37	1
38	2
39	4
40	3
41	1
42	16
43	2
44	2
45	1
46	12
47	8
48	2
49	1
50	1
51	12
52	7
53	9
54	4
55	12
56	4
57	8
58	3
59	2
60	4
61	1
62	16
63	4
64	1
65	2
66	24
67	2
68	3
69	16
70	24
71	12
72	1
73	1
74	1
75	2
76	2
77	16
78	4
79	8
80	1
81	11
82	3
83	2
84	16
85	18
86	2
87	4
88	6
89	3
90	3
91	8
92	4
93	64
94	24
95	4
96	6
97	7
98	3
99	2

n	a(n)
1	1
2	1
3	2
4	1
5	1
6	2
7	4
8	1
9	1
10	3
11	2
12	2
13	1
14	4
15	4
16	1
17	3
18	1
19	2
20	1
21	16
22	6
23	4
24	2
25	1
26	1
27	4
28	4
29	1
30	12
31	16
32	3
33	8
34	9
35	8
36	1
37	1
38	2
39	4
40	3
41	1
42	16
43	2
44	2
45	1
46	12
47	8
48	2
49	1
50	1
51	12
52	7
53	9
54	4
55	12
56	4
57	8
58	3
59	2
60	4
61	1
62	16
63	4
64	1
65	2
66	24
67	2
68	3
69	16
70	24
71	12
72	1
73	1
74	1
75	2
76	2
77	16
78	4
79	8
80	1
81	11
82	3
83	2
84	16
85	18
86	2
87	4
88	6
89	3
90	3
91	8
92	4
93	64
94	24
95	4
96	6
97	7
98	3
99	2

n	a(n)
1	1
2	1
3	2
4	1
5	1
6	2
7	4
8	1
9	1
10	3
11	2
12	2
13	1
14	4
15	4
16	1
17	3
18	1
19	2
20	1
21	16
22	6
23	4
24	2
25	1
26	1
27	4
28	4
29	1
30	12
31	16
32	3
33	8
34	9
35	8
36	1
37	1
38	2
39	4
40	3
41	1
42	16
43	2
44	2
45	1
46	12
47	8
48	2
49	1
50	1
51	12
52	7
53	9
54	4
55	12
56	4
57	8
58	3
59	2
60	4
61	1
62	16
63	4
64	1
65	2
66	24
67	2
68	3
69	16
70	24
71	12
72	1
73	1
74	1
75	2
76	2
77	16
78	4
79	8
80	1
81	11
82	3
83	2
84	16
85	18
86	2
87	4
88	6
89	3
90	3
91	8
92	4
93	64
94	24
95	4
96	6
97	7
98	3
99	2