A374127 - cp's OEIS frontend

A374127 a(n) = (sigma(n) - sopfr(n)) - n, where sigma is the sum of divisors, and sopfr is the sum of prime factors (with repetition).

n	a(n)
1	0
2	-1
3	-2
4	-1
5	-4
6	1
7	-6
8	1
9	-2
10	1
11	-10
12	9
13	-12
14	1
15	1
16	7
17	-16
18	13
19	-18
20	13
21	1
22	1
23	-22
24	27
25	-4
26	1
27	4
28	17
29	-28
30	32
31	-30
32	21
33	1
34	1
35	1
36	45
37	-36
38	1
39	1
40	39
41	-40
42	42
43	-42
44	25
45	22
46	1
47	-46
48	65
49	-6
50	31
51	1
52	29
53	-52
54	55
55	1
56	51
57	1
58	1
59	-58
60	96
61	-60
62	1
63	28
64	51
65	1
66	62
67	-66
68	37
69	1
70	60
71	-70
72	111
73	-72
74	1
75	36
76	41
77	1
78	72
79	-78
80	93
81	28

[0, -1, -2, -1, -4, 1, -6, 1, -2, 1, -10, 9, -12, 1, 1, 7, -16, 13, -18, 13, 1, 1, -22, 27, -4, 1, 4, 17, -28, 32, -30, 21, 1, 1, 1, 45, -36, 1, 1, 39, -40, 42, -42, 25, 22, 1, -46, 65, -6, 31, 1, 29, -52, 55, 1, 51, 1, 1, -58, 96, -60, 1, 28, 51, 1, 62, -66, 37, 1, 60, -70, 111, -72, 1, 36, 41, 1, 72, -78, 93, 28]

cp's OEIS Frontend

A374127 a(n) = (sigma(n) - sopfr(n)) - n, where sigma is the sum of divisors, and sopfr is the sum of prime factors (with repetition).

Table of values

List of values

n	a(n)
1	0
2	-1
3	-2
4	-1
5	-4
6	1
7	-6
8	1
9	-2
10	1
11	-10
12	9
13	-12
14	1
15	1
16	7
17	-16
18	13
19	-18
20	13
21	1
22	1
23	-22
24	27
25	-4
26	1
27	4
28	17
29	-28
30	32
31	-30
32	21
33	1
34	1
35	1
36	45
37	-36
38	1
39	1
40	39
41	-40
42	42
43	-42
44	25
45	22
46	1
47	-46
48	65
49	-6
50	31
51	1
52	29
53	-52
54	55
55	1
56	51
57	1
58	1
59	-58
60	96
61	-60
62	1
63	28
64	51
65	1
66	62
67	-66
68	37
69	1
70	60
71	-70
72	111
73	-72
74	1
75	36
76	41
77	1
78	72
79	-78
80	93
81	28

n	a(n)
1	0
2	-1
3	-2
4	-1
5	-4
6	1
7	-6
8	1
9	-2
10	1
11	-10
12	9
13	-12
14	1
15	1
16	7
17	-16
18	13
19	-18
20	13
21	1
22	1
23	-22
24	27
25	-4
26	1
27	4
28	17
29	-28
30	32
31	-30
32	21
33	1
34	1
35	1
36	45
37	-36
38	1
39	1
40	39
41	-40
42	42
43	-42
44	25
45	22
46	1
47	-46
48	65
49	-6
50	31
51	1
52	29
53	-52
54	55
55	1
56	51
57	1
58	1
59	-58
60	96
61	-60
62	1
63	28
64	51
65	1
66	62
67	-66
68	37
69	1
70	60
71	-70
72	111
73	-72
74	1
75	36
76	41
77	1
78	72
79	-78
80	93
81	28

n	a(n)
1	0
2	-1
3	-2
4	-1
5	-4
6	1
7	-6
8	1
9	-2
10	1
11	-10
12	9
13	-12
14	1
15	1
16	7
17	-16
18	13
19	-18
20	13
21	1
22	1
23	-22
24	27
25	-4
26	1
27	4
28	17
29	-28
30	32
31	-30
32	21
33	1
34	1
35	1
36	45
37	-36
38	1
39	1
40	39
41	-40
42	42
43	-42
44	25
45	22
46	1
47	-46
48	65
49	-6
50	31
51	1
52	29
53	-52
54	55
55	1
56	51
57	1
58	1
59	-58
60	96
61	-60
62	1
63	28
64	51
65	1
66	62
67	-66
68	37
69	1
70	60
71	-70
72	111
73	-72
74	1
75	36
76	41
77	1
78	72
79	-78
80	93
81	28