A163642 - cp's OEIS frontend

A163642 a(n) = the smallest composite positive integer that is not yet in the sequence and that is coprime to n.

n	a(n)
1	4
2	9
3	8
4	15
5	6
6	25
7	10
8	21
9	14
10	27
11	12
12	35
13	16
14	33
15	22
16	39
17	18
18	49
19	20
20	51
21	26
22	45
23	24
24	55
25	28
26	57
27	32
28	65
29	30
30	77
31	34
32	63
33	38
34	69
35	36
36	85
37	40
38	75
39	44
40	81
41	42
42	95
43	46
44	87
45	52
46	91
47	48
48	115
49	50
50	93
51	56
52	99
53	54
54	119
55	58
56	111
57	62
58	105
59	60
60	121
61	64
62	117
63	68
64	123
65	66
66	125
67	70
68	129
69	74

[4, 9, 8, 15, 6, 25, 10, 21, 14, 27, 12, 35, 16, 33, 22, 39, 18, 49, 20, 51, 26, 45, 24, 55, 28, 57, 32, 65, 30, 77, 34, 63, 38, 69, 36, 85, 40, 75, 44, 81, 42, 95, 46, 87, 52, 91, 48, 115, 50, 93, 56, 99, 54, 119, 58, 111, 62, 105, 60, 121, 64, 117, 68, 123, 66, 125, 70, 129, 74]

cp's OEIS Frontend

A163642 a(n) = the smallest composite positive integer that is not yet in the sequence and that is coprime to n.

Table of values

List of values

n	a(n)
1	4
2	9
3	8
4	15
5	6
6	25
7	10
8	21
9	14
10	27
11	12
12	35
13	16
14	33
15	22
16	39
17	18
18	49
19	20
20	51
21	26
22	45
23	24
24	55
25	28
26	57
27	32
28	65
29	30
30	77
31	34
32	63
33	38
34	69
35	36
36	85
37	40
38	75
39	44
40	81
41	42
42	95
43	46
44	87
45	52
46	91
47	48
48	115
49	50
50	93
51	56
52	99
53	54
54	119
55	58
56	111
57	62
58	105
59	60
60	121
61	64
62	117
63	68
64	123
65	66
66	125
67	70
68	129
69	74

n	a(n)
1	4
2	9
3	8
4	15
5	6
6	25
7	10
8	21
9	14
10	27
11	12
12	35
13	16
14	33
15	22
16	39
17	18
18	49
19	20
20	51
21	26
22	45
23	24
24	55
25	28
26	57
27	32
28	65
29	30
30	77
31	34
32	63
33	38
34	69
35	36
36	85
37	40
38	75
39	44
40	81
41	42
42	95
43	46
44	87
45	52
46	91
47	48
48	115
49	50
50	93
51	56
52	99
53	54
54	119
55	58
56	111
57	62
58	105
59	60
60	121
61	64
62	117
63	68
64	123
65	66
66	125
67	70
68	129
69	74

n	a(n)
1	4
2	9
3	8
4	15
5	6
6	25
7	10
8	21
9	14
10	27
11	12
12	35
13	16
14	33
15	22
16	39
17	18
18	49
19	20
20	51
21	26
22	45
23	24
24	55
25	28
26	57
27	32
28	65
29	30
30	77
31	34
32	63
33	38
34	69
35	36
36	85
37	40
38	75
39	44
40	81
41	42
42	95
43	46
44	87
45	52
46	91
47	48
48	115
49	50
50	93
51	56
52	99
53	54
54	119
55	58
56	111
57	62
58	105
59	60
60	121
61	64
62	117
63	68
64	123
65	66
66	125
67	70
68	129
69	74