A295301 - cp's OEIS frontend

A295301 a(n) = n - phi(sigma(n)), where phi = A000010 and sigma = A000203.

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

[0, 0, 1, -2, 3, 2, 3, 0, -3, 4, 7, 0, 7, 6, 7, -14, 11, -6, 11, 8, 5, 10, 15, 8, -5, 14, 11, 4, 21, 6, 15, -4, 17, 16, 19, -36, 19, 22, 15, 16, 29, 10, 23, 20, 21, 22, 31, -12, 13, -10, 27, 10, 35, 22, 31, 24, 25, 34, 43, 12, 31, 30, 15, -62, 41, 18, 35, 32, 37, 22, 47, -24, 37, 38, 15, 28, 45, 30, 47, 20]

cp's OEIS Frontend

A295301 a(n) = n - phi(sigma(n)), where phi = A000010 and sigma = A000203.

Table of values

List of values

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

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

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