A090128 - cp's OEIS frontend

A090128 Distinct values of sigma(k), the sum of divisors, in order of appearance as k grows.

n	a(n)
1	1
2	3
3	4
4	7
5	6
6	12
7	8
8	15
9	13
10	18
11	28
12	14
13	24
14	31
15	39
16	20
17	42
18	32
19	36
20	60
21	40
22	56
23	30
24	72
25	63
26	48
27	54
28	91
29	38
30	90
31	96
32	44
33	84
34	78
35	124
36	57
37	93
38	98
39	120
40	80
41	168
42	62
43	104
44	127
45	144
46	68
47	126
48	195
49	74
50	114
51	140
52	186
53	121
54	224
55	108
56	132
57	180
58	234
59	112
60	128
61	252
62	171
63	156
64	217

[1, 3, 4, 7, 6, 12, 8, 15, 13, 18, 28, 14, 24, 31, 39, 20, 42, 32, 36, 60, 40, 56, 30, 72, 63, 48, 54, 91, 38, 90, 96, 44, 84, 78, 124, 57, 93, 98, 120, 80, 168, 62, 104, 127, 144, 68, 126, 195, 74, 114, 140, 186, 121, 224, 108, 132, 180, 234, 112, 128, 252, 171, 156, 217]

cp's OEIS Frontend

A090128 Distinct values of sigma(k), the sum of divisors, in order of appearance as k grows.

Table of values

List of values

n	a(n)
1	1
2	3
3	4
4	7
5	6
6	12
7	8
8	15
9	13
10	18
11	28
12	14
13	24
14	31
15	39
16	20
17	42
18	32
19	36
20	60
21	40
22	56
23	30
24	72
25	63
26	48
27	54
28	91
29	38
30	90
31	96
32	44
33	84
34	78
35	124
36	57
37	93
38	98
39	120
40	80
41	168
42	62
43	104
44	127
45	144
46	68
47	126
48	195
49	74
50	114
51	140
52	186
53	121
54	224
55	108
56	132
57	180
58	234
59	112
60	128
61	252
62	171
63	156
64	217

n	a(n)
1	1
2	3
3	4
4	7
5	6
6	12
7	8
8	15
9	13
10	18
11	28
12	14
13	24
14	31
15	39
16	20
17	42
18	32
19	36
20	60
21	40
22	56
23	30
24	72
25	63
26	48
27	54
28	91
29	38
30	90
31	96
32	44
33	84
34	78
35	124
36	57
37	93
38	98
39	120
40	80
41	168
42	62
43	104
44	127
45	144
46	68
47	126
48	195
49	74
50	114
51	140
52	186
53	121
54	224
55	108
56	132
57	180
58	234
59	112
60	128
61	252
62	171
63	156
64	217

n	a(n)
1	1
2	3
3	4
4	7
5	6
6	12
7	8
8	15
9	13
10	18
11	28
12	14
13	24
14	31
15	39
16	20
17	42
18	32
19	36
20	60
21	40
22	56
23	30
24	72
25	63
26	48
27	54
28	91
29	38
30	90
31	96
32	44
33	84
34	78
35	124
36	57
37	93
38	98
39	120
40	80
41	168
42	62
43	104
44	127
45	144
46	68
47	126
48	195
49	74
50	114
51	140
52	186
53	121
54	224
55	108
56	132
57	180
58	234
59	112
60	128
61	252
62	171
63	156
64	217