A326045 - cp's OEIS frontend

A326045 a(n) is the sum of divisors of n, minus the largest square dividing that sum, minus n: a(n) = sigma(n) - A008833(sigma(n)) - n.

n	a(n)
1	-1
2	0
3	-3
4	2
5	0
6	2
7	-3
8	6
9	3
10	-1
11	-3
12	12
13	0
14	6
15	5
16	14
17	-8
18	20
19	-3
20	21
21	-5
22	-22
23	-3
24	32
25	5
26	15
27	9
28	24
29	0
30	6
31	-15
32	22
33	-1
34	11
35	-3
36	54
37	0
38	18
39	13
40	41
41	0
42	38
43	-3
44	36
45	32
46	-10
47	-15
48	72
49	7
50	42
51	-15
52	-3
53	-8
54	62
55	-19
56	60
57	7
58	23
59	-3
60	104
61	0
62	18
63	37
64	62
65	15
66	-66
67	-3
68	49
69	11
70	-70
71	-35
72	122
73	0
74	39
75	45
76	60
77	3
78	86
79	-15
80	105
81	-81
82	35
83	-3

[-1, 0, -3, 2, 0, 2, -3, 6, 3, -1, -3, 12, 0, 6, 5, 14, -8, 20, -3, 21, -5, -22, -3, 32, 5, 15, 9, 24, 0, 6, -15, 22, -1, 11, -3, 54, 0, 18, 13, 41, 0, 38, -3, 36, 32, -10, -15, 72, 7, 42, -15, -3, -8, 62, -19, 60, 7, 23, -3, 104, 0, 18, 37, 62, 15, -66, -3, 49, 11, -70, -35, 122, 0, 39, 45, 60, 3, 86, -15, 105, -81, 35, -3]

cp's OEIS Frontend

A326045 a(n) is the sum of divisors of n, minus the largest square dividing that sum, minus n: a(n) = sigma(n) - A008833(sigma(n)) - n.

Table of values

List of values

n	a(n)
1	-1
2	0
3	-3
4	2
5	0
6	2
7	-3
8	6
9	3
10	-1
11	-3
12	12
13	0
14	6
15	5
16	14
17	-8
18	20
19	-3
20	21
21	-5
22	-22
23	-3
24	32
25	5
26	15
27	9
28	24
29	0
30	6
31	-15
32	22
33	-1
34	11
35	-3
36	54
37	0
38	18
39	13
40	41
41	0
42	38
43	-3
44	36
45	32
46	-10
47	-15
48	72
49	7
50	42
51	-15
52	-3
53	-8
54	62
55	-19
56	60
57	7
58	23
59	-3
60	104
61	0
62	18
63	37
64	62
65	15
66	-66
67	-3
68	49
69	11
70	-70
71	-35
72	122
73	0
74	39
75	45
76	60
77	3
78	86
79	-15
80	105
81	-81
82	35
83	-3

n	a(n)
1	-1
2	0
3	-3
4	2
5	0
6	2
7	-3
8	6
9	3
10	-1
11	-3
12	12
13	0
14	6
15	5
16	14
17	-8
18	20
19	-3
20	21
21	-5
22	-22
23	-3
24	32
25	5
26	15
27	9
28	24
29	0
30	6
31	-15
32	22
33	-1
34	11
35	-3
36	54
37	0
38	18
39	13
40	41
41	0
42	38
43	-3
44	36
45	32
46	-10
47	-15
48	72
49	7
50	42
51	-15
52	-3
53	-8
54	62
55	-19
56	60
57	7
58	23
59	-3
60	104
61	0
62	18
63	37
64	62
65	15
66	-66
67	-3
68	49
69	11
70	-70
71	-35
72	122
73	0
74	39
75	45
76	60
77	3
78	86
79	-15
80	105
81	-81
82	35
83	-3

n	a(n)
1	-1
2	0
3	-3
4	2
5	0
6	2
7	-3
8	6
9	3
10	-1
11	-3
12	12
13	0
14	6
15	5
16	14
17	-8
18	20
19	-3
20	21
21	-5
22	-22
23	-3
24	32
25	5
26	15
27	9
28	24
29	0
30	6
31	-15
32	22
33	-1
34	11
35	-3
36	54
37	0
38	18
39	13
40	41
41	0
42	38
43	-3
44	36
45	32
46	-10
47	-15
48	72
49	7
50	42
51	-15
52	-3
53	-8
54	62
55	-19
56	60
57	7
58	23
59	-3
60	104
61	0
62	18
63	37
64	62
65	15
66	-66
67	-3
68	49
69	11
70	-70
71	-35
72	122
73	0
74	39
75	45
76	60
77	3
78	86
79	-15
80	105
81	-81
82	35
83	-3