A356850 - cp's OEIS frontend

A356850 a(1) = 1, a(2) = 2; for n > 2, a(n) is the smallest positive number not occurring earlier such that a(n) is coprime to the previous Omega(a(n)) terms.

n	a(n)
1	1
2	2
3	3
4	5
5	4
6	7
7	9
8	10
9	11
10	13
11	6
12	17
13	19
14	14
15	15
16	23
17	22
18	21
19	25
20	26
21	29
22	27
23	31
24	8
25	33
26	35
27	34
28	37
29	39
30	38
31	41
32	43
33	45
34	28
35	47
36	51
37	46
38	49
39	53
40	55
41	12
42	59
43	61
44	57
45	20
46	67
47	69
48	58
49	65
50	71
51	62
52	63
53	73
54	74
55	77
56	75
57	79
58	52
59	83
60	85
61	81
62	44
63	89
64	87
65	82
66	91
67	93
68	86
69	95
70	97
71	94
72	99
73	101
74	103
75	50
76	107

[1, 2, 3, 5, 4, 7, 9, 10, 11, 13, 6, 17, 19, 14, 15, 23, 22, 21, 25, 26, 29, 27, 31, 8, 33, 35, 34, 37, 39, 38, 41, 43, 45, 28, 47, 51, 46, 49, 53, 55, 12, 59, 61, 57, 20, 67, 69, 58, 65, 71, 62, 63, 73, 74, 77, 75, 79, 52, 83, 85, 81, 44, 89, 87, 82, 91, 93, 86, 95, 97, 94, 99, 101, 103, 50, 107]

cp's OEIS Frontend

A356850 a(1) = 1, a(2) = 2; for n > 2, a(n) is the smallest positive number not occurring earlier such that a(n) is coprime to the previous Omega(a(n)) terms.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	5
5	4
6	7
7	9
8	10
9	11
10	13
11	6
12	17
13	19
14	14
15	15
16	23
17	22
18	21
19	25
20	26
21	29
22	27
23	31
24	8
25	33
26	35
27	34
28	37
29	39
30	38
31	41
32	43
33	45
34	28
35	47
36	51
37	46
38	49
39	53
40	55
41	12
42	59
43	61
44	57
45	20
46	67
47	69
48	58
49	65
50	71
51	62
52	63
53	73
54	74
55	77
56	75
57	79
58	52
59	83
60	85
61	81
62	44
63	89
64	87
65	82
66	91
67	93
68	86
69	95
70	97
71	94
72	99
73	101
74	103
75	50
76	107

n	a(n)
1	1
2	2
3	3
4	5
5	4
6	7
7	9
8	10
9	11
10	13
11	6
12	17
13	19
14	14
15	15
16	23
17	22
18	21
19	25
20	26
21	29
22	27
23	31
24	8
25	33
26	35
27	34
28	37
29	39
30	38
31	41
32	43
33	45
34	28
35	47
36	51
37	46
38	49
39	53
40	55
41	12
42	59
43	61
44	57
45	20
46	67
47	69
48	58
49	65
50	71
51	62
52	63
53	73
54	74
55	77
56	75
57	79
58	52
59	83
60	85
61	81
62	44
63	89
64	87
65	82
66	91
67	93
68	86
69	95
70	97
71	94
72	99
73	101
74	103
75	50
76	107

n	a(n)
1	1
2	2
3	3
4	5
5	4
6	7
7	9
8	10
9	11
10	13
11	6
12	17
13	19
14	14
15	15
16	23
17	22
18	21
19	25
20	26
21	29
22	27
23	31
24	8
25	33
26	35
27	34
28	37
29	39
30	38
31	41
32	43
33	45
34	28
35	47
36	51
37	46
38	49
39	53
40	55
41	12
42	59
43	61
44	57
45	20
46	67
47	69
48	58
49	65
50	71
51	62
52	63
53	73
54	74
55	77
56	75
57	79
58	52
59	83
60	85
61	81
62	44
63	89
64	87
65	82
66	91
67	93
68	86
69	95
70	97
71	94
72	99
73	101
74	103
75	50
76	107