A351561 - cp's OEIS frontend

A351561 a(n) = n + d(n) - phi(n), where d is the number of divisors function, and phi is the Euler totient function.

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

[1, 3, 3, 5, 3, 8, 3, 8, 6, 10, 3, 14, 3, 12, 11, 13, 3, 18, 3, 18, 13, 16, 3, 24, 8, 18, 13, 22, 3, 30, 3, 22, 17, 22, 15, 33, 3, 24, 19, 32, 3, 38, 3, 30, 27, 28, 3, 42, 10, 36, 23, 34, 3, 44, 19, 40, 25, 34, 3, 56, 3, 36, 33, 39, 21, 54, 3, 42, 29, 54, 3, 60, 3, 42, 41, 46, 21, 62, 3, 58, 32, 46, 3, 72, 25, 48]

cp's OEIS Frontend

A351561 a(n) = n + d(n) - phi(n), where d is the number of divisors function, and phi is the Euler totient function.

Table of values

List of values

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

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

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