A345315 - cp's OEIS frontend

A345315 a(n) = Sum_{d|n} d^[Omega(d) = 2], where [ ] is the Iverson bracket.

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

[1, 2, 2, 6, 2, 9, 2, 7, 11, 13, 2, 14, 2, 17, 18, 8, 2, 19, 2, 18, 24, 25, 2, 16, 27, 29, 12, 22, 2, 36, 2, 9, 36, 37, 38, 25, 2, 41, 42, 20, 2, 46, 2, 30, 28, 49, 2, 18, 51, 39, 54, 34, 2, 21, 58, 24, 60, 61, 2, 43, 2, 65, 34, 10, 68, 66, 2, 42, 72, 64, 2, 28, 2, 77, 44, 46, 80]

cp's OEIS Frontend

A345315 a(n) = Sum_{d|n} d^[Omega(d) = 2], where [ ] is the Iverson bracket.

Table of values

List of values

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

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

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