A349330 - cp's OEIS frontend

A349330 a(n) = Sum_{d|n} d^c(d), where c is the characteristic function of squares (A010052).

n	a(n)
1	1
2	2
3	2
4	6
5	2
6	4
7	2
8	7
9	11
10	4
11	2
12	9
13	2
14	4
15	4
16	23
17	2
18	14
19	2
20	9
21	4
22	4
23	2
24	11
25	27
26	4
27	12
28	9
29	2
30	8
31	2
32	24
33	4
34	4
35	4
36	55
37	2
38	4
39	4
40	11
41	2
42	8
43	2
44	9
45	14
46	4
47	2
48	28
49	51
50	30
51	4
52	9
53	2
54	16
55	4
56	11
57	4
58	4
59	2
60	15
61	2
62	4
63	14
64	88
65	4
66	8
67	2
68	9
69	4
70	8
71	2
72	58
73	2
74	4
75	30
76	9
77	4
78	8
79	2
80	28
81	93
82	4
83	2
84	15
85	4
86	4
87	4

[1, 2, 2, 6, 2, 4, 2, 7, 11, 4, 2, 9, 2, 4, 4, 23, 2, 14, 2, 9, 4, 4, 2, 11, 27, 4, 12, 9, 2, 8, 2, 24, 4, 4, 4, 55, 2, 4, 4, 11, 2, 8, 2, 9, 14, 4, 2, 28, 51, 30, 4, 9, 2, 16, 4, 11, 4, 4, 2, 15, 2, 4, 14, 88, 4, 8, 2, 9, 4, 8, 2, 58, 2, 4, 30, 9, 4, 8, 2, 28, 93, 4, 2, 15, 4, 4, 4]

cp's OEIS Frontend

A349330 a(n) = Sum_{d|n} d^c(d), where c is the characteristic function of squares (A010052).

Table of values

List of values

n	a(n)
1	1
2	2
3	2
4	6
5	2
6	4
7	2
8	7
9	11
10	4
11	2
12	9
13	2
14	4
15	4
16	23
17	2
18	14
19	2
20	9
21	4
22	4
23	2
24	11
25	27
26	4
27	12
28	9
29	2
30	8
31	2
32	24
33	4
34	4
35	4
36	55
37	2
38	4
39	4
40	11
41	2
42	8
43	2
44	9
45	14
46	4
47	2
48	28
49	51
50	30
51	4
52	9
53	2
54	16
55	4
56	11
57	4
58	4
59	2
60	15
61	2
62	4
63	14
64	88
65	4
66	8
67	2
68	9
69	4
70	8
71	2
72	58
73	2
74	4
75	30
76	9
77	4
78	8
79	2
80	28
81	93
82	4
83	2
84	15
85	4
86	4
87	4

n	a(n)
1	1
2	2
3	2
4	6
5	2
6	4
7	2
8	7
9	11
10	4
11	2
12	9
13	2
14	4
15	4
16	23
17	2
18	14
19	2
20	9
21	4
22	4
23	2
24	11
25	27
26	4
27	12
28	9
29	2
30	8
31	2
32	24
33	4
34	4
35	4
36	55
37	2
38	4
39	4
40	11
41	2
42	8
43	2
44	9
45	14
46	4
47	2
48	28
49	51
50	30
51	4
52	9
53	2
54	16
55	4
56	11
57	4
58	4
59	2
60	15
61	2
62	4
63	14
64	88
65	4
66	8
67	2
68	9
69	4
70	8
71	2
72	58
73	2
74	4
75	30
76	9
77	4
78	8
79	2
80	28
81	93
82	4
83	2
84	15
85	4
86	4
87	4

n	a(n)
1	1
2	2
3	2
4	6
5	2
6	4
7	2
8	7
9	11
10	4
11	2
12	9
13	2
14	4
15	4
16	23
17	2
18	14
19	2
20	9
21	4
22	4
23	2
24	11
25	27
26	4
27	12
28	9
29	2
30	8
31	2
32	24
33	4
34	4
35	4
36	55
37	2
38	4
39	4
40	11
41	2
42	8
43	2
44	9
45	14
46	4
47	2
48	28
49	51
50	30
51	4
52	9
53	2
54	16
55	4
56	11
57	4
58	4
59	2
60	15
61	2
62	4
63	14
64	88
65	4
66	8
67	2
68	9
69	4
70	8
71	2
72	58
73	2
74	4
75	30
76	9
77	4
78	8
79	2
80	28
81	93
82	4
83	2
84	15
85	4
86	4
87	4