A023897 - cp's OEIS frontend

A023897 a(n) = sigma_1(k) / phi(k) where k = A020492(n) is the n-th balanced number.

n	a(n)
1	1
2	3
3	2
4	6
5	7
6	4
7	3
8	9
9	2
10	8
11	5
12	6
13	7
14	4
15	7
16	10
17	5
18	12
19	4
20	9
21	10
22	3
23	4
24	14
25	10
26	8
27	6
28	13
29	9
30	8
31	5
32	15
33	7
34	2
35	6
36	8
37	4
38	5
39	12
40	6
41	7
42	10
43	10
44	11
45	14
46	12
47	9
48	4
49	3
50	4
51	12
52	9
53	4
54	4
55	7
56	5
57	7
58	10
59	3
60	5
61	4
62	13
63	14
64	12
65	10
66	9
67	10
68	8
69	7
70	4
71	8
72	6
73	18
74	9
75	3
76	8
77	13
78	8
79	15
80	15
81	8
82	3
83	14
84	9
85	10
86	8
87	8
88	10
89	5
90	7
91	8
92	11
93	6
94	11
95	13
96	6

[1, 3, 2, 6, 7, 4, 3, 9, 2, 8, 5, 6, 7, 4, 7, 10, 5, 12, 4, 9, 10, 3, 4, 14, 10, 8, 6, 13, 9, 8, 5, 15, 7, 2, 6, 8, 4, 5, 12, 6, 7, 10, 10, 11, 14, 12, 9, 4, 3, 4, 12, 9, 4, 4, 7, 5, 7, 10, 3, 5, 4, 13, 14, 12, 10, 9, 10, 8, 7, 4, 8, 6, 18, 9, 3, 8, 13, 8, 15, 15, 8, 3, 14, 9, 10, 8, 8, 10, 5, 7, 8, 11, 6, 11, 13, 6]

cp's OEIS Frontend

A023897 a(n) = sigma_1(k) / phi(k) where k = A020492(n) is the n-th balanced number.

Table of values

List of values

n	a(n)
1	1
2	3
3	2
4	6
5	7
6	4
7	3
8	9
9	2
10	8
11	5
12	6
13	7
14	4
15	7
16	10
17	5
18	12
19	4
20	9
21	10
22	3
23	4
24	14
25	10
26	8
27	6
28	13
29	9
30	8
31	5
32	15
33	7
34	2
35	6
36	8
37	4
38	5
39	12
40	6
41	7
42	10
43	10
44	11
45	14
46	12
47	9
48	4
49	3
50	4
51	12
52	9
53	4
54	4
55	7
56	5
57	7
58	10
59	3
60	5
61	4
62	13
63	14
64	12
65	10
66	9
67	10
68	8
69	7
70	4
71	8
72	6
73	18
74	9
75	3
76	8
77	13
78	8
79	15
80	15
81	8
82	3
83	14
84	9
85	10
86	8
87	8
88	10
89	5
90	7
91	8
92	11
93	6
94	11
95	13
96	6

n	a(n)
1	1
2	3
3	2
4	6
5	7
6	4
7	3
8	9
9	2
10	8
11	5
12	6
13	7
14	4
15	7
16	10
17	5
18	12
19	4
20	9
21	10
22	3
23	4
24	14
25	10
26	8
27	6
28	13
29	9
30	8
31	5
32	15
33	7
34	2
35	6
36	8
37	4
38	5
39	12
40	6
41	7
42	10
43	10
44	11
45	14
46	12
47	9
48	4
49	3
50	4
51	12
52	9
53	4
54	4
55	7
56	5
57	7
58	10
59	3
60	5
61	4
62	13
63	14
64	12
65	10
66	9
67	10
68	8
69	7
70	4
71	8
72	6
73	18
74	9
75	3
76	8
77	13
78	8
79	15
80	15
81	8
82	3
83	14
84	9
85	10
86	8
87	8
88	10
89	5
90	7
91	8
92	11
93	6
94	11
95	13
96	6

n	a(n)
1	1
2	3
3	2
4	6
5	7
6	4
7	3
8	9
9	2
10	8
11	5
12	6
13	7
14	4
15	7
16	10
17	5
18	12
19	4
20	9
21	10
22	3
23	4
24	14
25	10
26	8
27	6
28	13
29	9
30	8
31	5
32	15
33	7
34	2
35	6
36	8
37	4
38	5
39	12
40	6
41	7
42	10
43	10
44	11
45	14
46	12
47	9
48	4
49	3
50	4
51	12
52	9
53	4
54	4
55	7
56	5
57	7
58	10
59	3
60	5
61	4
62	13
63	14
64	12
65	10
66	9
67	10
68	8
69	7
70	4
71	8
72	6
73	18
74	9
75	3
76	8
77	13
78	8
79	15
80	15
81	8
82	3
83	14
84	9
85	10
86	8
87	8
88	10
89	5
90	7
91	8
92	11
93	6
94	11
95	13
96	6