A326188 - cp's OEIS frontend

A326188 a(n) = A001065(n) - A003557(n), where A001065(n) = the sum of proper divisors of n, and A003557(n) = n divided by its largest squarefree divisor.

n	a(n)
1	-1
2	0
3	0
4	1
5	0
6	5
7	0
8	3
9	1
10	7
11	0
12	14
13	0
14	9
15	8
16	7
17	0
18	18
19	0
20	20
21	10
22	13
23	0
24	32
25	1
26	15
27	4
28	26
29	0
30	41
31	0
32	15
33	14
34	19
35	12
36	49
37	0
38	21
39	16
40	46
41	0
42	53
43	0
44	38
45	30
46	25
47	0
48	68
49	1
50	38
51	20
52	44
53	0
54	57
55	16
56	60
57	22
58	31
59	0
60	106
61	0
62	33
63	38
64	31
65	18
66	77
67	0
68	56
69	26
70	73
71	0
72	111
73	0
74	39
75	44
76	62
77	18
78	89
79	0
80	98
81	13
82	43
83	0
84	138
85	22
86	45
87	32
88	88
89	0
90	141
91	20

[-1, 0, 0, 1, 0, 5, 0, 3, 1, 7, 0, 14, 0, 9, 8, 7, 0, 18, 0, 20, 10, 13, 0, 32, 1, 15, 4, 26, 0, 41, 0, 15, 14, 19, 12, 49, 0, 21, 16, 46, 0, 53, 0, 38, 30, 25, 0, 68, 1, 38, 20, 44, 0, 57, 16, 60, 22, 31, 0, 106, 0, 33, 38, 31, 18, 77, 0, 56, 26, 73, 0, 111, 0, 39, 44, 62, 18, 89, 0, 98, 13, 43, 0, 138, 22, 45, 32, 88, 0, 141, 20]

cp's OEIS Frontend

A326188 a(n) = A001065(n) - A003557(n), where A001065(n) = the sum of proper divisors of n, and A003557(n) = n divided by its largest squarefree divisor.

Table of values

List of values

n	a(n)
1	-1
2	0
3	0
4	1
5	0
6	5
7	0
8	3
9	1
10	7
11	0
12	14
13	0
14	9
15	8
16	7
17	0
18	18
19	0
20	20
21	10
22	13
23	0
24	32
25	1
26	15
27	4
28	26
29	0
30	41
31	0
32	15
33	14
34	19
35	12
36	49
37	0
38	21
39	16
40	46
41	0
42	53
43	0
44	38
45	30
46	25
47	0
48	68
49	1
50	38
51	20
52	44
53	0
54	57
55	16
56	60
57	22
58	31
59	0
60	106
61	0
62	33
63	38
64	31
65	18
66	77
67	0
68	56
69	26
70	73
71	0
72	111
73	0
74	39
75	44
76	62
77	18
78	89
79	0
80	98
81	13
82	43
83	0
84	138
85	22
86	45
87	32
88	88
89	0
90	141
91	20

n	a(n)
1	-1
2	0
3	0
4	1
5	0
6	5
7	0
8	3
9	1
10	7
11	0
12	14
13	0
14	9
15	8
16	7
17	0
18	18
19	0
20	20
21	10
22	13
23	0
24	32
25	1
26	15
27	4
28	26
29	0
30	41
31	0
32	15
33	14
34	19
35	12
36	49
37	0
38	21
39	16
40	46
41	0
42	53
43	0
44	38
45	30
46	25
47	0
48	68
49	1
50	38
51	20
52	44
53	0
54	57
55	16
56	60
57	22
58	31
59	0
60	106
61	0
62	33
63	38
64	31
65	18
66	77
67	0
68	56
69	26
70	73
71	0
72	111
73	0
74	39
75	44
76	62
77	18
78	89
79	0
80	98
81	13
82	43
83	0
84	138
85	22
86	45
87	32
88	88
89	0
90	141
91	20

n	a(n)
1	-1
2	0
3	0
4	1
5	0
6	5
7	0
8	3
9	1
10	7
11	0
12	14
13	0
14	9
15	8
16	7
17	0
18	18
19	0
20	20
21	10
22	13
23	0
24	32
25	1
26	15
27	4
28	26
29	0
30	41
31	0
32	15
33	14
34	19
35	12
36	49
37	0
38	21
39	16
40	46
41	0
42	53
43	0
44	38
45	30
46	25
47	0
48	68
49	1
50	38
51	20
52	44
53	0
54	57
55	16
56	60
57	22
58	31
59	0
60	106
61	0
62	33
63	38
64	31
65	18
66	77
67	0
68	56
69	26
70	73
71	0
72	111
73	0
74	39
75	44
76	62
77	18
78	89
79	0
80	98
81	13
82	43
83	0
84	138
85	22
86	45
87	32
88	88
89	0
90	141
91	20