A062069 - cp's OEIS frontend

A062069 a(n) = sigma(d(n)), where d(k) is the number of divisors function (A000005) and sigma(k) is the sum of divisors function (A000203).

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

[1, 3, 3, 4, 3, 7, 3, 7, 4, 7, 3, 12, 3, 7, 7, 6, 3, 12, 3, 12, 7, 7, 3, 15, 4, 7, 7, 12, 3, 15, 3, 12, 7, 7, 7, 13, 3, 7, 7, 15, 3, 15, 3, 12, 12, 7, 3, 18, 4, 12, 7, 12, 3, 15, 7, 15, 7, 7, 3, 28, 3, 7, 12, 8, 7, 15, 3, 12, 7, 15, 3, 28, 3, 7, 12, 12, 7, 15, 3, 18, 6, 7, 3, 28, 7, 7, 7, 15, 3]

cp's OEIS Frontend

A062069 a(n) = sigma(d(n)), where d(k) is the number of divisors function (A000005) and sigma(k) is the sum of divisors function (A000203).

Table of values

List of values

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

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

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