A122984 - cp's OEIS frontend

A122984 Smallest positive composite number, relatively prime to n, such that a(n)+n is also composite.

n	a(n)
1	8
2	25
3	22
4	21
5	4
6	49
7	8
8	25
9	16
10	39
11	4
12	65
13	8
14	25
15	34
16	9
17	4
18	77
19	6
20	49
21	4
22	27
23	4
24	25
25	8
26	9
27	8
28	27
29	4
30	91
31	4
32	25
33	16
34	15
35	4
36	49
37	8
38	25
39	10
40	9
41	4
42	143
43	6
44	21
45	4
46	9
47	4
48	77
49	6
50	27
51	4
52	25
53	4
54	65
55	8
56	9
57	8
58	27
59	4
60	143
61	4
62	15
63	22
64	21
65	4
66	25
67	8
68	9
69	8
70	51
71	4
72	49
73	4
74	21
75	16
76	9
77	4
78	55
79	6
80	39
81	4
82	9
83	4
84	85

[8, 25, 22, 21, 4, 49, 8, 25, 16, 39, 4, 65, 8, 25, 34, 9, 4, 77, 6, 49, 4, 27, 4, 25, 8, 9, 8, 27, 4, 91, 4, 25, 16, 15, 4, 49, 8, 25, 10, 9, 4, 143, 6, 21, 4, 9, 4, 77, 6, 27, 4, 25, 4, 65, 8, 9, 8, 27, 4, 143, 4, 15, 22, 21, 4, 25, 8, 9, 8, 51, 4, 49, 4, 21, 16, 9, 4, 55, 6, 39, 4, 9, 4, 85]

cp's OEIS Frontend

A122984 Smallest positive composite number, relatively prime to n, such that a(n)+n is also composite.

Table of values

List of values

n	a(n)
1	8
2	25
3	22
4	21
5	4
6	49
7	8
8	25
9	16
10	39
11	4
12	65
13	8
14	25
15	34
16	9
17	4
18	77
19	6
20	49
21	4
22	27
23	4
24	25
25	8
26	9
27	8
28	27
29	4
30	91
31	4
32	25
33	16
34	15
35	4
36	49
37	8
38	25
39	10
40	9
41	4
42	143
43	6
44	21
45	4
46	9
47	4
48	77
49	6
50	27
51	4
52	25
53	4
54	65
55	8
56	9
57	8
58	27
59	4
60	143
61	4
62	15
63	22
64	21
65	4
66	25
67	8
68	9
69	8
70	51
71	4
72	49
73	4
74	21
75	16
76	9
77	4
78	55
79	6
80	39
81	4
82	9
83	4
84	85

n	a(n)
1	8
2	25
3	22
4	21
5	4
6	49
7	8
8	25
9	16
10	39
11	4
12	65
13	8
14	25
15	34
16	9
17	4
18	77
19	6
20	49
21	4
22	27
23	4
24	25
25	8
26	9
27	8
28	27
29	4
30	91
31	4
32	25
33	16
34	15
35	4
36	49
37	8
38	25
39	10
40	9
41	4
42	143
43	6
44	21
45	4
46	9
47	4
48	77
49	6
50	27
51	4
52	25
53	4
54	65
55	8
56	9
57	8
58	27
59	4
60	143
61	4
62	15
63	22
64	21
65	4
66	25
67	8
68	9
69	8
70	51
71	4
72	49
73	4
74	21
75	16
76	9
77	4
78	55
79	6
80	39
81	4
82	9
83	4
84	85

n	a(n)
1	8
2	25
3	22
4	21
5	4
6	49
7	8
8	25
9	16
10	39
11	4
12	65
13	8
14	25
15	34
16	9
17	4
18	77
19	6
20	49
21	4
22	27
23	4
24	25
25	8
26	9
27	8
28	27
29	4
30	91
31	4
32	25
33	16
34	15
35	4
36	49
37	8
38	25
39	10
40	9
41	4
42	143
43	6
44	21
45	4
46	9
47	4
48	77
49	6
50	27
51	4
52	25
53	4
54	65
55	8
56	9
57	8
58	27
59	4
60	143
61	4
62	15
63	22
64	21
65	4
66	25
67	8
68	9
69	8
70	51
71	4
72	49
73	4
74	21
75	16
76	9
77	4
78	55
79	6
80	39
81	4
82	9
83	4
84	85