A097465 - cp's OEIS frontend

A097465 a(1) = 1; for n>1, a(n) = smallest positive integer which is not among earlier terms of sequence, is coprime to a(n-1) and is not equal to a(n-1) +- 1.

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

[1, 3, 5, 2, 7, 4, 9, 11, 6, 13, 8, 15, 17, 10, 19, 12, 23, 14, 25, 16, 21, 26, 29, 18, 31, 20, 27, 22, 35, 24, 37, 28, 33, 38, 41, 30, 43, 32, 39, 34, 45, 47, 36, 49, 40, 51, 44, 53, 42, 55, 46, 57, 50, 59, 48, 61, 52, 63, 58, 65, 54, 67, 56, 69, 62, 71, 60, 73, 64, 75, 68, 77]

cp's OEIS Frontend

A097465 a(1) = 1; for n>1, a(n) = smallest positive integer which is not among earlier terms of sequence, is coprime to a(n-1) and is not equal to a(n-1) +- 1.

Table of values

List of values

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

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

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