A365984 - cp's OEIS frontend

A365984 Starting with a(1) = 2, the lexicographically earliest infinite sequence of distinct positive integers such that |a(n) - a(n-1)| is a divisor of a(n), and where |a(n) - a(n-1)| > 1.

n	a(n)
1	2
2	4
3	6
4	8
5	10
6	12
7	9
8	18
9	15
10	20
11	16
12	14
13	21
14	24
15	22
16	33
17	30
18	25
19	50
20	40
21	32
22	28
23	26
24	39
25	36
26	27
27	54
28	45
29	42
30	35
31	70
32	56
33	48
34	44
35	46
36	69
37	66
38	55
39	60
40	57
41	38
42	76
43	72
44	63
45	84
46	77
47	88
48	80
49	64
50	62
51	93
52	90
53	75
54	78
55	52
56	65
57	130
58	104
59	91
60	98
61	96
62	92
63	94
64	141
65	138
66	115
67	110
68	99
69	102
70	51
71	34
72	68
73	85
74	170

[2, 4, 6, 8, 10, 12, 9, 18, 15, 20, 16, 14, 21, 24, 22, 33, 30, 25, 50, 40, 32, 28, 26, 39, 36, 27, 54, 45, 42, 35, 70, 56, 48, 44, 46, 69, 66, 55, 60, 57, 38, 76, 72, 63, 84, 77, 88, 80, 64, 62, 93, 90, 75, 78, 52, 65, 130, 104, 91, 98, 96, 92, 94, 141, 138, 115, 110, 99, 102, 51, 34, 68, 85, 170]

cp's OEIS Frontend

A365984 Starting with a(1) = 2, the lexicographically earliest infinite sequence of distinct positive integers such that |a(n) - a(n-1)| is a divisor of a(n), and where |a(n) - a(n-1)| > 1.

Table of values

List of values

n	a(n)
1	2
2	4
3	6
4	8
5	10
6	12
7	9
8	18
9	15
10	20
11	16
12	14
13	21
14	24
15	22
16	33
17	30
18	25
19	50
20	40
21	32
22	28
23	26
24	39
25	36
26	27
27	54
28	45
29	42
30	35
31	70
32	56
33	48
34	44
35	46
36	69
37	66
38	55
39	60
40	57
41	38
42	76
43	72
44	63
45	84
46	77
47	88
48	80
49	64
50	62
51	93
52	90
53	75
54	78
55	52
56	65
57	130
58	104
59	91
60	98
61	96
62	92
63	94
64	141
65	138
66	115
67	110
68	99
69	102
70	51
71	34
72	68
73	85
74	170

n	a(n)
1	2
2	4
3	6
4	8
5	10
6	12
7	9
8	18
9	15
10	20
11	16
12	14
13	21
14	24
15	22
16	33
17	30
18	25
19	50
20	40
21	32
22	28
23	26
24	39
25	36
26	27
27	54
28	45
29	42
30	35
31	70
32	56
33	48
34	44
35	46
36	69
37	66
38	55
39	60
40	57
41	38
42	76
43	72
44	63
45	84
46	77
47	88
48	80
49	64
50	62
51	93
52	90
53	75
54	78
55	52
56	65
57	130
58	104
59	91
60	98
61	96
62	92
63	94
64	141
65	138
66	115
67	110
68	99
69	102
70	51
71	34
72	68
73	85
74	170

n	a(n)
1	2
2	4
3	6
4	8
5	10
6	12
7	9
8	18
9	15
10	20
11	16
12	14
13	21
14	24
15	22
16	33
17	30
18	25
19	50
20	40
21	32
22	28
23	26
24	39
25	36
26	27
27	54
28	45
29	42
30	35
31	70
32	56
33	48
34	44
35	46
36	69
37	66
38	55
39	60
40	57
41	38
42	76
43	72
44	63
45	84
46	77
47	88
48	80
49	64
50	62
51	93
52	90
53	75
54	78
55	52
56	65
57	130
58	104
59	91
60	98
61	96
62	92
63	94
64	141
65	138
66	115
67	110
68	99
69	102
70	51
71	34
72	68
73	85
74	170