A349872 - cp's OEIS frontend

A349872 a(1) = 2; for n > 1, a(n) is the smallest unused number > 1 such that none of the previous a(n) terms divide a(n).

n	a(n)
1	2
2	3
3	5
4	7
5	11
6	4
7	13
8	17
9	6
10	19
11	23
12	9
13	29
14	10
15	8
16	31
17	37
18	41
19	14
20	15
21	43
22	12
23	47
24	53
25	59
26	21
27	61
28	22
29	25
30	67
31	18
32	16
33	71
34	26
35	20
36	73
37	79
38	83
39	33
40	27
41	35
42	89
43	34
44	97
45	101
46	103
47	24
48	28
49	38
50	39
51	30
52	107
53	109
54	49
55	113
56	127
57	131
58	46
59	137
60	51
61	55
62	139
63	149
64	151
65	32
66	45
67	157
68	36
69	42
70	57
71	163
72	58
73	44

[2, 3, 5, 7, 11, 4, 13, 17, 6, 19, 23, 9, 29, 10, 8, 31, 37, 41, 14, 15, 43, 12, 47, 53, 59, 21, 61, 22, 25, 67, 18, 16, 71, 26, 20, 73, 79, 83, 33, 27, 35, 89, 34, 97, 101, 103, 24, 28, 38, 39, 30, 107, 109, 49, 113, 127, 131, 46, 137, 51, 55, 139, 149, 151, 32, 45, 157, 36, 42, 57, 163, 58, 44]

cp's OEIS Frontend

A349872 a(1) = 2; for n > 1, a(n) is the smallest unused number > 1 such that none of the previous a(n) terms divide a(n).

Table of values

List of values

n	a(n)
1	2
2	3
3	5
4	7
5	11
6	4
7	13
8	17
9	6
10	19
11	23
12	9
13	29
14	10
15	8
16	31
17	37
18	41
19	14
20	15
21	43
22	12
23	47
24	53
25	59
26	21
27	61
28	22
29	25
30	67
31	18
32	16
33	71
34	26
35	20
36	73
37	79
38	83
39	33
40	27
41	35
42	89
43	34
44	97
45	101
46	103
47	24
48	28
49	38
50	39
51	30
52	107
53	109
54	49
55	113
56	127
57	131
58	46
59	137
60	51
61	55
62	139
63	149
64	151
65	32
66	45
67	157
68	36
69	42
70	57
71	163
72	58
73	44

n	a(n)
1	2
2	3
3	5
4	7
5	11
6	4
7	13
8	17
9	6
10	19
11	23
12	9
13	29
14	10
15	8
16	31
17	37
18	41
19	14
20	15
21	43
22	12
23	47
24	53
25	59
26	21
27	61
28	22
29	25
30	67
31	18
32	16
33	71
34	26
35	20
36	73
37	79
38	83
39	33
40	27
41	35
42	89
43	34
44	97
45	101
46	103
47	24
48	28
49	38
50	39
51	30
52	107
53	109
54	49
55	113
56	127
57	131
58	46
59	137
60	51
61	55
62	139
63	149
64	151
65	32
66	45
67	157
68	36
69	42
70	57
71	163
72	58
73	44

n	a(n)
1	2
2	3
3	5
4	7
5	11
6	4
7	13
8	17
9	6
10	19
11	23
12	9
13	29
14	10
15	8
16	31
17	37
18	41
19	14
20	15
21	43
22	12
23	47
24	53
25	59
26	21
27	61
28	22
29	25
30	67
31	18
32	16
33	71
34	26
35	20
36	73
37	79
38	83
39	33
40	27
41	35
42	89
43	34
44	97
45	101
46	103
47	24
48	28
49	38
50	39
51	30
52	107
53	109
54	49
55	113
56	127
57	131
58	46
59	137
60	51
61	55
62	139
63	149
64	151
65	32
66	45
67	157
68	36
69	42
70	57
71	163
72	58
73	44