A355929 - cp's OEIS frontend

A355929 Difference between the squarefree part of the sum of divisors of n and the squarefree part of n.

n	a(n)
1	0
2	1
3	-2
4	6
5	1
6	-3
7	-5
8	13
9	12
10	-8
11	-8
12	4
13	1
14	-8
15	-9
16	30
17	-15
18	37
19	-14
20	37
21	-19
22	-21
23	-17
24	9
25	30
26	16
27	7
28	7
29	1
30	-28
31	-29
32	5
33	-30
34	-28
35	-32
36	90
37	1
38	-23
39	-25
40	0
41	1
42	-36
43	-32
44	10
45	73
46	-44
47	-44
48	28
49	56
50	91
51	-49
52	-11
53	-47
54	24
55	-53
56	16
57	-52
58	-48
59	-44
60	27
61	1
62	-56
63	19
64	126
65	-44
66	-65
67	-50
68	-3
69	-63
70	-69
71	-69
72	193
73	1
74	40
75	28
76	16

[0, 1, -2, 6, 1, -3, -5, 13, 12, -8, -8, 4, 1, -8, -9, 30, -15, 37, -14, 37, -19, -21, -17, 9, 30, 16, 7, 7, 1, -28, -29, 5, -30, -28, -32, 90, 1, -23, -25, 0, 1, -36, -32, 10, 73, -44, -44, 28, 56, 91, -49, -11, -47, 24, -53, 16, -52, -48, -44, 27, 1, -56, 19, 126, -44, -65, -50, -3, -63, -69, -69, 193, 1, 40, 28, 16]

cp's OEIS Frontend

A355929 Difference between the squarefree part of the sum of divisors of n and the squarefree part of n.

Table of values

List of values

n	a(n)
1	0
2	1
3	-2
4	6
5	1
6	-3
7	-5
8	13
9	12
10	-8
11	-8
12	4
13	1
14	-8
15	-9
16	30
17	-15
18	37
19	-14
20	37
21	-19
22	-21
23	-17
24	9
25	30
26	16
27	7
28	7
29	1
30	-28
31	-29
32	5
33	-30
34	-28
35	-32
36	90
37	1
38	-23
39	-25
40	0
41	1
42	-36
43	-32
44	10
45	73
46	-44
47	-44
48	28
49	56
50	91
51	-49
52	-11
53	-47
54	24
55	-53
56	16
57	-52
58	-48
59	-44
60	27
61	1
62	-56
63	19
64	126
65	-44
66	-65
67	-50
68	-3
69	-63
70	-69
71	-69
72	193
73	1
74	40
75	28
76	16

n	a(n)
1	0
2	1
3	-2
4	6
5	1
6	-3
7	-5
8	13
9	12
10	-8
11	-8
12	4
13	1
14	-8
15	-9
16	30
17	-15
18	37
19	-14
20	37
21	-19
22	-21
23	-17
24	9
25	30
26	16
27	7
28	7
29	1
30	-28
31	-29
32	5
33	-30
34	-28
35	-32
36	90
37	1
38	-23
39	-25
40	0
41	1
42	-36
43	-32
44	10
45	73
46	-44
47	-44
48	28
49	56
50	91
51	-49
52	-11
53	-47
54	24
55	-53
56	16
57	-52
58	-48
59	-44
60	27
61	1
62	-56
63	19
64	126
65	-44
66	-65
67	-50
68	-3
69	-63
70	-69
71	-69
72	193
73	1
74	40
75	28
76	16

n	a(n)
1	0
2	1
3	-2
4	6
5	1
6	-3
7	-5
8	13
9	12
10	-8
11	-8
12	4
13	1
14	-8
15	-9
16	30
17	-15
18	37
19	-14
20	37
21	-19
22	-21
23	-17
24	9
25	30
26	16
27	7
28	7
29	1
30	-28
31	-29
32	5
33	-30
34	-28
35	-32
36	90
37	1
38	-23
39	-25
40	0
41	1
42	-36
43	-32
44	10
45	73
46	-44
47	-44
48	28
49	56
50	91
51	-49
52	-11
53	-47
54	24
55	-53
56	16
57	-52
58	-48
59	-44
60	27
61	1
62	-56
63	19
64	126
65	-44
66	-65
67	-50
68	-3
69	-63
70	-69
71	-69
72	193
73	1
74	40
75	28
76	16