A318653 - cp's OEIS frontend

A318653 Numerators of the sequence whose Dirichlet convolution with itself yields A007947, the squarefree kernel of n.

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

[1, 1, 3, 1, 5, 3, 7, 1, 3, 5, 11, 3, 13, 7, 15, 3, 17, 3, 19, 5, 21, 11, 23, 3, -5, 13, 15, 7, 29, 15, 31, 3, 33, 17, 35, 3, 37, 19, 39, 5, 41, 21, 43, 11, 15, 23, 47, 9, -21, -5, 51, 13, 53, 15, 55, 7, 57, 29, 59, 15, 61, 31, 21, 5, 65, 33, 67, 17, 69, 35, 71, 3, 73, 37, -15, 19, 77, 39, 79, 15, 3, 41, 83, 21, 85, 43, 87, 11, 89, 15]

cp's OEIS Frontend

A318653 Numerators of the sequence whose Dirichlet convolution with itself yields A007947, the squarefree kernel of n.

Table of values

List of values

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

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

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