A317847 - cp's OEIS frontend

A317847 Numerators of sequence whose Dirichlet convolution with itself yields A303757, the ordinal transform of function a(1) = 0; a(n) = phi(n) for n > 1, where phi is Euler's totient function (A000010).

n	a(n)
1	1
2	1
3	1
4	7
5	1
6	5
7	1
8	9
9	7
10	5
11	1
12	15
13	1
14	5
15	1
16	43
17	1
18	15
19	1
20	7
21	3
22	3
23	1
24	5
25	3
26	5
27	9
28	15
29	1
30	9
31	1
32	87
33	3
34	5
35	1
36	1
37	1
38	5
39	3
40	13
41	1
42	11
43	1
44	11
45	15
46	3
47	1
48	187
49	7
50	19
51	1
52	15
53	1
54	5
55	3
56	21
57	3
58	3
59	1
60	-1
61	1
62	3
63	11
64	387
65	1
66	9
67	1
68	7
69	1
70	13
71	1
72	119
73	1
74	7
75	19
76	23
77	3
78	19
79	1
80	139
81	-21
82	7
83	1
84	21
85	1
86	5
87	1
88	39
89	1
90	67
91	3
92	3
93	5
94	3
95	5
96	451
97	1
98	15
99	19
100	69
101	1
102	13
103	1
104	-27
105	7

[1, 1, 1, 7, 1, 5, 1, 9, 7, 5, 1, 15, 1, 5, 1, 43, 1, 15, 1, 7, 3, 3, 1, 5, 3, 5, 9, 15, 1, 9, 1, 87, 3, 5, 1, 1, 1, 5, 3, 13, 1, 11, 1, 11, 15, 3, 1, 187, 7, 19, 1, 15, 1, 5, 3, 21, 3, 3, 1, -1, 1, 3, 11, 387, 1, 9, 1, 7, 1, 13, 1, 119, 1, 7, 19, 23, 3, 19, 1, 139, -21, 7, 1, 21, 1, 5, 1, 39, 1, 67, 3, 3, 5, 3, 5, 451, 1, 15, 19, 69, 1, 13, 1, -27, 7]

cp's OEIS Frontend

A317847 Numerators of sequence whose Dirichlet convolution with itself yields A303757, the ordinal transform of function a(1) = 0; a(n) = phi(n) for n > 1, where phi is Euler's totient function (A000010).

Table of values

List of values

n	a(n)
1	1
2	1
3	1
4	7
5	1
6	5
7	1
8	9
9	7
10	5
11	1
12	15
13	1
14	5
15	1
16	43
17	1
18	15
19	1
20	7
21	3
22	3
23	1
24	5
25	3
26	5
27	9
28	15
29	1
30	9
31	1
32	87
33	3
34	5
35	1
36	1
37	1
38	5
39	3
40	13
41	1
42	11
43	1
44	11
45	15
46	3
47	1
48	187
49	7
50	19
51	1
52	15
53	1
54	5
55	3
56	21
57	3
58	3
59	1
60	-1
61	1
62	3
63	11
64	387
65	1
66	9
67	1
68	7
69	1
70	13
71	1
72	119
73	1
74	7
75	19
76	23
77	3
78	19
79	1
80	139
81	-21
82	7
83	1
84	21
85	1
86	5
87	1
88	39
89	1
90	67
91	3
92	3
93	5
94	3
95	5
96	451
97	1
98	15
99	19
100	69
101	1
102	13
103	1
104	-27
105	7

n	a(n)
1	1
2	1
3	1
4	7
5	1
6	5
7	1
8	9
9	7
10	5
11	1
12	15
13	1
14	5
15	1
16	43
17	1
18	15
19	1
20	7
21	3
22	3
23	1
24	5
25	3
26	5
27	9
28	15
29	1
30	9
31	1
32	87
33	3
34	5
35	1
36	1
37	1
38	5
39	3
40	13
41	1
42	11
43	1
44	11
45	15
46	3
47	1
48	187
49	7
50	19
51	1
52	15
53	1
54	5
55	3
56	21
57	3
58	3
59	1
60	-1
61	1
62	3
63	11
64	387
65	1
66	9
67	1
68	7
69	1
70	13
71	1
72	119
73	1
74	7
75	19
76	23
77	3
78	19
79	1
80	139
81	-21
82	7
83	1
84	21
85	1
86	5
87	1
88	39
89	1
90	67
91	3
92	3
93	5
94	3
95	5
96	451
97	1
98	15
99	19
100	69
101	1
102	13
103	1
104	-27
105	7

n	a(n)
1	1
2	1
3	1
4	7
5	1
6	5
7	1
8	9
9	7
10	5
11	1
12	15
13	1
14	5
15	1
16	43
17	1
18	15
19	1
20	7
21	3
22	3
23	1
24	5
25	3
26	5
27	9
28	15
29	1
30	9
31	1
32	87
33	3
34	5
35	1
36	1
37	1
38	5
39	3
40	13
41	1
42	11
43	1
44	11
45	15
46	3
47	1
48	187
49	7
50	19
51	1
52	15
53	1
54	5
55	3
56	21
57	3
58	3
59	1
60	-1
61	1
62	3
63	11
64	387
65	1
66	9
67	1
68	7
69	1
70	13
71	1
72	119
73	1
74	7
75	19
76	23
77	3
78	19
79	1
80	139
81	-21
82	7
83	1
84	21
85	1
86	5
87	1
88	39
89	1
90	67
91	3
92	3
93	5
94	3
95	5
96	451
97	1
98	15
99	19
100	69
101	1
102	13
103	1
104	-27
105	7