A378098 - cp's OEIS frontend

A378098 Lexicographically earliest sequence of distinct positive integers such that a(a(n)) shares a factor with a(a(n)-1).

n	a(n)
1	2
2	4
3	5
4	10
5	6
6	8
7	9
8	12
9	14
10	16
11	13
12	26
13	18
14	15
15	20
16	22
17	19
18	38
19	24
20	21
21	27
22	30
23	25
24	35
25	28
26	32
27	34
28	36
29	23
30	46
31	33
32	39
33	42
34	40
35	44
36	48
37	41
38	82
39	50
40	45
41	51
42	54
43	47
44	94
45	52
46	56
47	49
48	63
49	57
50	60
51	55
52	65
53	58
54	62
55	64
56	66
57	68
58	70
59	61
60	122
61	72
62	69
63	75
64	78
65	74
66	76
67	71
68	142
69	80
70	84
71	77
72	88
73	79
74	158
75	86
76	90
77	81
78	87
79	93
80	96
81	92
82	98
83	85
84	95
85	100
86	102
87	99
88	105
89	91
90	104

[2, 4, 5, 10, 6, 8, 9, 12, 14, 16, 13, 26, 18, 15, 20, 22, 19, 38, 24, 21, 27, 30, 25, 35, 28, 32, 34, 36, 23, 46, 33, 39, 42, 40, 44, 48, 41, 82, 50, 45, 51, 54, 47, 94, 52, 56, 49, 63, 57, 60, 55, 65, 58, 62, 64, 66, 68, 70, 61, 122, 72, 69, 75, 78, 74, 76, 71, 142, 80, 84, 77, 88, 79, 158, 86, 90, 81, 87, 93, 96, 92, 98, 85, 95, 100, 102, 99, 105, 91, 104]

cp's OEIS Frontend

A378098 Lexicographically earliest sequence of distinct positive integers such that a(a(n)) shares a factor with a(a(n)-1).

Table of values

List of values

n	a(n)
1	2
2	4
3	5
4	10
5	6
6	8
7	9
8	12
9	14
10	16
11	13
12	26
13	18
14	15
15	20
16	22
17	19
18	38
19	24
20	21
21	27
22	30
23	25
24	35
25	28
26	32
27	34
28	36
29	23
30	46
31	33
32	39
33	42
34	40
35	44
36	48
37	41
38	82
39	50
40	45
41	51
42	54
43	47
44	94
45	52
46	56
47	49
48	63
49	57
50	60
51	55
52	65
53	58
54	62
55	64
56	66
57	68
58	70
59	61
60	122
61	72
62	69
63	75
64	78
65	74
66	76
67	71
68	142
69	80
70	84
71	77
72	88
73	79
74	158
75	86
76	90
77	81
78	87
79	93
80	96
81	92
82	98
83	85
84	95
85	100
86	102
87	99
88	105
89	91
90	104

n	a(n)
1	2
2	4
3	5
4	10
5	6
6	8
7	9
8	12
9	14
10	16
11	13
12	26
13	18
14	15
15	20
16	22
17	19
18	38
19	24
20	21
21	27
22	30
23	25
24	35
25	28
26	32
27	34
28	36
29	23
30	46
31	33
32	39
33	42
34	40
35	44
36	48
37	41
38	82
39	50
40	45
41	51
42	54
43	47
44	94
45	52
46	56
47	49
48	63
49	57
50	60
51	55
52	65
53	58
54	62
55	64
56	66
57	68
58	70
59	61
60	122
61	72
62	69
63	75
64	78
65	74
66	76
67	71
68	142
69	80
70	84
71	77
72	88
73	79
74	158
75	86
76	90
77	81
78	87
79	93
80	96
81	92
82	98
83	85
84	95
85	100
86	102
87	99
88	105
89	91
90	104

n	a(n)
1	2
2	4
3	5
4	10
5	6
6	8
7	9
8	12
9	14
10	16
11	13
12	26
13	18
14	15
15	20
16	22
17	19
18	38
19	24
20	21
21	27
22	30
23	25
24	35
25	28
26	32
27	34
28	36
29	23
30	46
31	33
32	39
33	42
34	40
35	44
36	48
37	41
38	82
39	50
40	45
41	51
42	54
43	47
44	94
45	52
46	56
47	49
48	63
49	57
50	60
51	55
52	65
53	58
54	62
55	64
56	66
57	68
58	70
59	61
60	122
61	72
62	69
63	75
64	78
65	74
66	76
67	71
68	142
69	80
70	84
71	77
72	88
73	79
74	158
75	86
76	90
77	81
78	87
79	93
80	96
81	92
82	98
83	85
84	95
85	100
86	102
87	99
88	105
89	91
90	104