A152991 - cp's OEIS frontend

A152991 a(n) = sigma(n) - pi(n).

n	a(n)
1	1
2	2
3	2
4	5
5	3
6	9
7	4
8	11
9	9
10	14
11	7
12	23
13	8
14	18
15	18
16	25
17	11
18	32
19	12
20	34
21	24
22	28
23	15
24	51
25	22
26	33
27	31
28	47
29	20
30	62
31	21
32	52
33	37
34	43
35	37
36	80
37	26
38	48
39	44
40	78
41	29
42	83
43	30
44	70
45	64
46	58
47	33
48	109
49	42
50	78
51	57
52	83
53	38
54	104
55	56
56	104
57	64
58	74
59	43
60	151
61	44
62	78
63	86
64	109
65	66
66	126
67	49
68	107
69	77
70	125
71	52

[1, 2, 2, 5, 3, 9, 4, 11, 9, 14, 7, 23, 8, 18, 18, 25, 11, 32, 12, 34, 24, 28, 15, 51, 22, 33, 31, 47, 20, 62, 21, 52, 37, 43, 37, 80, 26, 48, 44, 78, 29, 83, 30, 70, 64, 58, 33, 109, 42, 78, 57, 83, 38, 104, 56, 104, 64, 74, 43, 151, 44, 78, 86, 109, 66, 126, 49, 107, 77, 125, 52]

cp's OEIS Frontend

A152991 a(n) = sigma(n) - pi(n).

Table of values

List of values

n	a(n)
1	1
2	2
3	2
4	5
5	3
6	9
7	4
8	11
9	9
10	14
11	7
12	23
13	8
14	18
15	18
16	25
17	11
18	32
19	12
20	34
21	24
22	28
23	15
24	51
25	22
26	33
27	31
28	47
29	20
30	62
31	21
32	52
33	37
34	43
35	37
36	80
37	26
38	48
39	44
40	78
41	29
42	83
43	30
44	70
45	64
46	58
47	33
48	109
49	42
50	78
51	57
52	83
53	38
54	104
55	56
56	104
57	64
58	74
59	43
60	151
61	44
62	78
63	86
64	109
65	66
66	126
67	49
68	107
69	77
70	125
71	52

n	a(n)
1	1
2	2
3	2
4	5
5	3
6	9
7	4
8	11
9	9
10	14
11	7
12	23
13	8
14	18
15	18
16	25
17	11
18	32
19	12
20	34
21	24
22	28
23	15
24	51
25	22
26	33
27	31
28	47
29	20
30	62
31	21
32	52
33	37
34	43
35	37
36	80
37	26
38	48
39	44
40	78
41	29
42	83
43	30
44	70
45	64
46	58
47	33
48	109
49	42
50	78
51	57
52	83
53	38
54	104
55	56
56	104
57	64
58	74
59	43
60	151
61	44
62	78
63	86
64	109
65	66
66	126
67	49
68	107
69	77
70	125
71	52

n	a(n)
1	1
2	2
3	2
4	5
5	3
6	9
7	4
8	11
9	9
10	14
11	7
12	23
13	8
14	18
15	18
16	25
17	11
18	32
19	12
20	34
21	24
22	28
23	15
24	51
25	22
26	33
27	31
28	47
29	20
30	62
31	21
32	52
33	37
34	43
35	37
36	80
37	26
38	48
39	44
40	78
41	29
42	83
43	30
44	70
45	64
46	58
47	33
48	109
49	42
50	78
51	57
52	83
53	38
54	104
55	56
56	104
57	64
58	74
59	43
60	151
61	44
62	78
63	86
64	109
65	66
66	126
67	49
68	107
69	77
70	125
71	52