A299777 - cp's OEIS frontend

A299777 a(n) is the sum of middle divisors of the n-th number that has middle divisors.

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

[1, 1, 2, 5, 2, 3, 7, 8, 4, 3, 9, 10, 5, 11, 11, 4, 12, 6, 13, 13, 14, 14, 7, 5, 15, 15, 16, 16, 8, 17, 17, 23, 18, 18, 9, 19, 19, 19, 20, 20, 7, 20, 10, 21, 21, 21, 22, 22, 45, 11, 23, 23, 23, 24, 24, 24, 37, 25, 26, 25, 25, 26, 26, 26, 13, 27, 27, 55, 27, 28, 29, 28, 28, 14, 29, 10, 29, 29, 30, 29]

cp's OEIS Frontend

A299777 a(n) is the sum of middle divisors of the n-th number that has middle divisors.

Table of values

List of values

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

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

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