A126212 - cp's OEIS frontend

A126212 a(n) = sum of the divisors of n which equal any d(k) for 1<=k<=n, where d(k) is the number of positive divisors of k.

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

[1, 3, 1, 3, 1, 6, 1, 7, 4, 3, 1, 16, 1, 3, 4, 7, 1, 12, 1, 12, 4, 3, 1, 24, 6, 3, 4, 7, 1, 17, 1, 15, 4, 3, 6, 25, 1, 3, 4, 20, 1, 12, 1, 7, 18, 3, 1, 24, 1, 18, 4, 7, 1, 21, 6, 15, 4, 3, 1, 43, 1, 3, 13, 15, 6, 12, 1, 7, 4, 25, 1, 45, 1, 3, 9, 7, 8, 12, 1, 30, 13, 3, 1, 35, 6, 3, 4, 15, 1, 36, 8]

cp's OEIS Frontend

A126212 a(n) = sum of the divisors of n which equal any d(k) for 1<=k<=n, where d(k) is the number of positive divisors of k.

Table of values

List of values

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

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

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