A152770 - cp's OEIS frontend

A152770 Sum of proper divisors minus the number of proper divisors of n: a(n) = sigma(n) - n - d(n) + 1.

n	a(n)
1	0
2	0
3	0
4	1
5	0
6	3
7	0
8	4
9	2
10	5
11	0
12	11
13	0
14	7
15	6
16	11
17	0
18	16
19	0
20	17
21	8
22	11
23	0
24	29
25	4
26	13
27	10
28	23
29	0
30	35
31	0
32	26
33	12
34	17
35	10
36	47
37	0
38	19
39	14
40	43
41	0
42	47
43	0
44	35
45	28
46	23
47	0
48	67
49	6
50	38
51	18
52	41
53	0
54	59
55	14
56	57
57	20
58	29
59	0
60	97
61	0
62	31
63	36
64	57
65	16
66	71
67	0
68	53
69	24
70	67
71	0
72	112
73	0
74	37
75	44
76	59
77	16
78	83
79	0
80	97

[0, 0, 0, 1, 0, 3, 0, 4, 2, 5, 0, 11, 0, 7, 6, 11, 0, 16, 0, 17, 8, 11, 0, 29, 4, 13, 10, 23, 0, 35, 0, 26, 12, 17, 10, 47, 0, 19, 14, 43, 0, 47, 0, 35, 28, 23, 0, 67, 6, 38, 18, 41, 0, 59, 14, 57, 20, 29, 0, 97, 0, 31, 36, 57, 16, 71, 0, 53, 24, 67, 0, 112, 0, 37, 44, 59, 16, 83, 0, 97]

cp's OEIS Frontend

A152770 Sum of proper divisors minus the number of proper divisors of n: a(n) = sigma(n) - n - d(n) + 1.

Table of values

List of values

n	a(n)
1	0
2	0
3	0
4	1
5	0
6	3
7	0
8	4
9	2
10	5
11	0
12	11
13	0
14	7
15	6
16	11
17	0
18	16
19	0
20	17
21	8
22	11
23	0
24	29
25	4
26	13
27	10
28	23
29	0
30	35
31	0
32	26
33	12
34	17
35	10
36	47
37	0
38	19
39	14
40	43
41	0
42	47
43	0
44	35
45	28
46	23
47	0
48	67
49	6
50	38
51	18
52	41
53	0
54	59
55	14
56	57
57	20
58	29
59	0
60	97
61	0
62	31
63	36
64	57
65	16
66	71
67	0
68	53
69	24
70	67
71	0
72	112
73	0
74	37
75	44
76	59
77	16
78	83
79	0
80	97

n	a(n)
1	0
2	0
3	0
4	1
5	0
6	3
7	0
8	4
9	2
10	5
11	0
12	11
13	0
14	7
15	6
16	11
17	0
18	16
19	0
20	17
21	8
22	11
23	0
24	29
25	4
26	13
27	10
28	23
29	0
30	35
31	0
32	26
33	12
34	17
35	10
36	47
37	0
38	19
39	14
40	43
41	0
42	47
43	0
44	35
45	28
46	23
47	0
48	67
49	6
50	38
51	18
52	41
53	0
54	59
55	14
56	57
57	20
58	29
59	0
60	97
61	0
62	31
63	36
64	57
65	16
66	71
67	0
68	53
69	24
70	67
71	0
72	112
73	0
74	37
75	44
76	59
77	16
78	83
79	0
80	97

n	a(n)
1	0
2	0
3	0
4	1
5	0
6	3
7	0
8	4
9	2
10	5
11	0
12	11
13	0
14	7
15	6
16	11
17	0
18	16
19	0
20	17
21	8
22	11
23	0
24	29
25	4
26	13
27	10
28	23
29	0
30	35
31	0
32	26
33	12
34	17
35	10
36	47
37	0
38	19
39	14
40	43
41	0
42	47
43	0
44	35
45	28
46	23
47	0
48	67
49	6
50	38
51	18
52	41
53	0
54	59
55	14
56	57
57	20
58	29
59	0
60	97
61	0
62	31
63	36
64	57
65	16
66	71
67	0
68	53
69	24
70	67
71	0
72	112
73	0
74	37
75	44
76	59
77	16
78	83
79	0
80	97