A180348 - cp's OEIS frontend

A180348 Lexicographically earliest sequence such that a(n) is coprime to the preceding 4 terms and does not occur earlier; a(n) = n for n=1,2,3,4.

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	7
7	11
8	9
9	8
10	13
11	17
12	19
13	15
14	14
15	23
16	29
17	31
18	25
19	6
20	37
21	41
22	43
23	35
24	12
25	47
26	53
27	59
28	49
29	10
30	27
31	61
32	67
33	71
34	16
35	21
36	55
37	73
38	79
39	26
40	51
41	77
42	83
43	89
44	20
45	39
46	97
47	101
48	103
49	22
50	45
51	91
52	107
53	109
54	32
55	33
56	65
57	113
58	119
59	38
60	69
61	121
62	125
63	127
64	28
65	57
66	131
67	85
68	137
69	44
70	63
71	139
72	95
73	149
74	34
75	81
76	143
77	115
78	133
79	58

[1, 2, 3, 4, 5, 7, 11, 9, 8, 13, 17, 19, 15, 14, 23, 29, 31, 25, 6, 37, 41, 43, 35, 12, 47, 53, 59, 49, 10, 27, 61, 67, 71, 16, 21, 55, 73, 79, 26, 51, 77, 83, 89, 20, 39, 97, 101, 103, 22, 45, 91, 107, 109, 32, 33, 65, 113, 119, 38, 69, 121, 125, 127, 28, 57, 131, 85, 137, 44, 63, 139, 95, 149, 34, 81, 143, 115, 133, 58]

cp's OEIS Frontend

A180348 Lexicographically earliest sequence such that a(n) is coprime to the preceding 4 terms and does not occur earlier; a(n) = n for n=1,2,3,4.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	7
7	11
8	9
9	8
10	13
11	17
12	19
13	15
14	14
15	23
16	29
17	31
18	25
19	6
20	37
21	41
22	43
23	35
24	12
25	47
26	53
27	59
28	49
29	10
30	27
31	61
32	67
33	71
34	16
35	21
36	55
37	73
38	79
39	26
40	51
41	77
42	83
43	89
44	20
45	39
46	97
47	101
48	103
49	22
50	45
51	91
52	107
53	109
54	32
55	33
56	65
57	113
58	119
59	38
60	69
61	121
62	125
63	127
64	28
65	57
66	131
67	85
68	137
69	44
70	63
71	139
72	95
73	149
74	34
75	81
76	143
77	115
78	133
79	58

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	7
7	11
8	9
9	8
10	13
11	17
12	19
13	15
14	14
15	23
16	29
17	31
18	25
19	6
20	37
21	41
22	43
23	35
24	12
25	47
26	53
27	59
28	49
29	10
30	27
31	61
32	67
33	71
34	16
35	21
36	55
37	73
38	79
39	26
40	51
41	77
42	83
43	89
44	20
45	39
46	97
47	101
48	103
49	22
50	45
51	91
52	107
53	109
54	32
55	33
56	65
57	113
58	119
59	38
60	69
61	121
62	125
63	127
64	28
65	57
66	131
67	85
68	137
69	44
70	63
71	139
72	95
73	149
74	34
75	81
76	143
77	115
78	133
79	58

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	7
7	11
8	9
9	8
10	13
11	17
12	19
13	15
14	14
15	23
16	29
17	31
18	25
19	6
20	37
21	41
22	43
23	35
24	12
25	47
26	53
27	59
28	49
29	10
30	27
31	61
32	67
33	71
34	16
35	21
36	55
37	73
38	79
39	26
40	51
41	77
42	83
43	89
44	20
45	39
46	97
47	101
48	103
49	22
50	45
51	91
52	107
53	109
54	32
55	33
56	65
57	113
58	119
59	38
60	69
61	121
62	125
63	127
64	28
65	57
66	131
67	85
68	137
69	44
70	63
71	139
72	95
73	149
74	34
75	81
76	143
77	115
78	133
79	58