A381019 - cp's OEIS frontend

A381019 a(n) is the smallest positive integer not yet in the sequence such that a(n) is relatively prime to a(n-i) for all 1 <= i <= min(a(n), n-1).

n	a(n)
1	1
2	2
3	3
4	5
5	7
6	11
7	4
8	13
9	17
10	19
11	23
12	29
13	9
14	31
15	37
16	8
17	41
18	43
19	47
20	53
21	59
22	61
23	6
24	67
25	71
26	73
27	79
28	83
29	89
30	25
31	97
32	101
33	103
34	107
35	109
36	12
37	113
38	127
39	131
40	137
41	139
42	149
43	151
44	157
45	163
46	167
47	10
48	173
49	179
50	181
51	191
52	193
53	197
54	199
55	49
56	211
57	223
58	227
59	229
60	233

[1, 2, 3, 5, 7, 11, 4, 13, 17, 19, 23, 29, 9, 31, 37, 8, 41, 43, 47, 53, 59, 61, 6, 67, 71, 73, 79, 83, 89, 25, 97, 101, 103, 107, 109, 12, 113, 127, 131, 137, 139, 149, 151, 157, 163, 167, 10, 173, 179, 181, 191, 193, 197, 199, 49, 211, 223, 227, 229, 233]

cp's OEIS Frontend

A381019 a(n) is the smallest positive integer not yet in the sequence such that a(n) is relatively prime to a(n-i) for all 1 <= i <= min(a(n), n-1).

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	5
5	7
6	11
7	4
8	13
9	17
10	19
11	23
12	29
13	9
14	31
15	37
16	8
17	41
18	43
19	47
20	53
21	59
22	61
23	6
24	67
25	71
26	73
27	79
28	83
29	89
30	25
31	97
32	101
33	103
34	107
35	109
36	12
37	113
38	127
39	131
40	137
41	139
42	149
43	151
44	157
45	163
46	167
47	10
48	173
49	179
50	181
51	191
52	193
53	197
54	199
55	49
56	211
57	223
58	227
59	229
60	233

n	a(n)
1	1
2	2
3	3
4	5
5	7
6	11
7	4
8	13
9	17
10	19
11	23
12	29
13	9
14	31
15	37
16	8
17	41
18	43
19	47
20	53
21	59
22	61
23	6
24	67
25	71
26	73
27	79
28	83
29	89
30	25
31	97
32	101
33	103
34	107
35	109
36	12
37	113
38	127
39	131
40	137
41	139
42	149
43	151
44	157
45	163
46	167
47	10
48	173
49	179
50	181
51	191
52	193
53	197
54	199
55	49
56	211
57	223
58	227
59	229
60	233

n	a(n)
1	1
2	2
3	3
4	5
5	7
6	11
7	4
8	13
9	17
10	19
11	23
12	29
13	9
14	31
15	37
16	8
17	41
18	43
19	47
20	53
21	59
22	61
23	6
24	67
25	71
26	73
27	79
28	83
29	89
30	25
31	97
32	101
33	103
34	107
35	109
36	12
37	113
38	127
39	131
40	137
41	139
42	149
43	151
44	157
45	163
46	167
47	10
48	173
49	179
50	181
51	191
52	193
53	197
54	199
55	49
56	211
57	223
58	227
59	229
60	233