A357595 - cp's OEIS frontend

A357595 Lexicographically earliest infinite sequence of distinct positive integers such that a(n+1) is the least k != j, for which gcd(k, j) > 1; j = n + a(n).

n	a(n)
1	1
2	4
3	2
4	10
5	6
6	22
7	7
8	8
9	12
10	3
11	26
12	74
13	14
14	9
15	46
16	122
17	15
18	16
19	17
20	18
21	19
22	5
23	21
24	11
25	20
26	24
27	25
28	13
29	82
30	27
31	30
32	183
33	35
34	28
35	31
36	32
37	34
38	142
39	33
40	36
41	38
42	158
43	40
44	166
45	39
46	42
47	44
48	49
49	194
50	45
51	50
52	202
53	48
54	303
55	51
56	52
57	54
58	37
59	55
60	56
61	29
62	57
63	63
64	58
65	60
66	65

[1, 4, 2, 10, 6, 22, 7, 8, 12, 3, 26, 74, 14, 9, 46, 122, 15, 16, 17, 18, 19, 5, 21, 11, 20, 24, 25, 13, 82, 27, 30, 183, 35, 28, 31, 32, 34, 142, 33, 36, 38, 158, 40, 166, 39, 42, 44, 49, 194, 45, 50, 202, 48, 303, 51, 52, 54, 37, 55, 56, 29, 57, 63, 58, 60, 65]

cp's OEIS Frontend

A357595 Lexicographically earliest infinite sequence of distinct positive integers such that a(n+1) is the least k != j, for which gcd(k, j) > 1; j = n + a(n).

Table of values

List of values

n	a(n)
1	1
2	4
3	2
4	10
5	6
6	22
7	7
8	8
9	12
10	3
11	26
12	74
13	14
14	9
15	46
16	122
17	15
18	16
19	17
20	18
21	19
22	5
23	21
24	11
25	20
26	24
27	25
28	13
29	82
30	27
31	30
32	183
33	35
34	28
35	31
36	32
37	34
38	142
39	33
40	36
41	38
42	158
43	40
44	166
45	39
46	42
47	44
48	49
49	194
50	45
51	50
52	202
53	48
54	303
55	51
56	52
57	54
58	37
59	55
60	56
61	29
62	57
63	63
64	58
65	60
66	65

n	a(n)
1	1
2	4
3	2
4	10
5	6
6	22
7	7
8	8
9	12
10	3
11	26
12	74
13	14
14	9
15	46
16	122
17	15
18	16
19	17
20	18
21	19
22	5
23	21
24	11
25	20
26	24
27	25
28	13
29	82
30	27
31	30
32	183
33	35
34	28
35	31
36	32
37	34
38	142
39	33
40	36
41	38
42	158
43	40
44	166
45	39
46	42
47	44
48	49
49	194
50	45
51	50
52	202
53	48
54	303
55	51
56	52
57	54
58	37
59	55
60	56
61	29
62	57
63	63
64	58
65	60
66	65

n	a(n)
1	1
2	4
3	2
4	10
5	6
6	22
7	7
8	8
9	12
10	3
11	26
12	74
13	14
14	9
15	46
16	122
17	15
18	16
19	17
20	18
21	19
22	5
23	21
24	11
25	20
26	24
27	25
28	13
29	82
30	27
31	30
32	183
33	35
34	28
35	31
36	32
37	34
38	142
39	33
40	36
41	38
42	158
43	40
44	166
45	39
46	42
47	44
48	49
49	194
50	45
51	50
52	202
53	48
54	303
55	51
56	52
57	54
58	37
59	55
60	56
61	29
62	57
63	63
64	58
65	60
66	65