A061069 - cp's OEIS frontend

A061069 Number of distinct values in the list of divisor-sums {sigma(j) : j=1...n}.

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

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 10, 11, 12, 13, 13, 14, 14, 15, 16, 17, 18, 19, 19, 20, 20, 20, 21, 22, 23, 24, 24, 25, 26, 27, 27, 28, 29, 29, 29, 30, 30, 31, 32, 33, 34, 34, 34, 35, 36, 37, 37, 38, 38, 39, 39, 39, 40, 40, 40, 41, 42, 42, 43, 44, 44, 45, 46, 47, 47, 47, 47, 48]

cp's OEIS Frontend

A061069 Number of distinct values in the list of divisor-sums {sigma(j) : j=1...n}.

Table of values

List of values

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

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

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