A361606 - cp's OEIS frontend

A361606 Lexicographically earliest infinite sequence of distinct positive numbers such that, for n > 3, a(n) shares a factor with a(n-1) and a(n-2) but not with a(n-1) + a(n-2).

n	a(n)
1	1
2	6
3	10
4	15
5	12
6	20
7	45
8	18
9	40
10	75
11	24
12	50
13	105
14	14
15	30
16	21
17	28
18	36
19	63
20	56
21	48
22	147
23	98
24	54
25	189
26	70
27	60
28	231
29	22
30	42
31	33
32	44
33	72
34	99
35	88
36	78
37	143
38	66
39	26
40	39
41	84
42	52
43	91
44	112
45	104
46	455
47	80
48	126
49	35
50	90
51	154
52	55
53	100
54	132
55	135
56	110
57	96
58	165
59	130
60	102
61	85
62	120
63	34
64	51
65	108
66	68
67	153
68	114

[1, 6, 10, 15, 12, 20, 45, 18, 40, 75, 24, 50, 105, 14, 30, 21, 28, 36, 63, 56, 48, 147, 98, 54, 189, 70, 60, 231, 22, 42, 33, 44, 72, 99, 88, 78, 143, 66, 26, 39, 84, 52, 91, 112, 104, 455, 80, 126, 35, 90, 154, 55, 100, 132, 135, 110, 96, 165, 130, 102, 85, 120, 34, 51, 108, 68, 153, 114]

cp's OEIS Frontend

A361606 Lexicographically earliest infinite sequence of distinct positive numbers such that, for n > 3, a(n) shares a factor with a(n-1) and a(n-2) but not with a(n-1) + a(n-2).

Table of values

List of values

n	a(n)
1	1
2	6
3	10
4	15
5	12
6	20
7	45
8	18
9	40
10	75
11	24
12	50
13	105
14	14
15	30
16	21
17	28
18	36
19	63
20	56
21	48
22	147
23	98
24	54
25	189
26	70
27	60
28	231
29	22
30	42
31	33
32	44
33	72
34	99
35	88
36	78
37	143
38	66
39	26
40	39
41	84
42	52
43	91
44	112
45	104
46	455
47	80
48	126
49	35
50	90
51	154
52	55
53	100
54	132
55	135
56	110
57	96
58	165
59	130
60	102
61	85
62	120
63	34
64	51
65	108
66	68
67	153
68	114

n	a(n)
1	1
2	6
3	10
4	15
5	12
6	20
7	45
8	18
9	40
10	75
11	24
12	50
13	105
14	14
15	30
16	21
17	28
18	36
19	63
20	56
21	48
22	147
23	98
24	54
25	189
26	70
27	60
28	231
29	22
30	42
31	33
32	44
33	72
34	99
35	88
36	78
37	143
38	66
39	26
40	39
41	84
42	52
43	91
44	112
45	104
46	455
47	80
48	126
49	35
50	90
51	154
52	55
53	100
54	132
55	135
56	110
57	96
58	165
59	130
60	102
61	85
62	120
63	34
64	51
65	108
66	68
67	153
68	114

n	a(n)
1	1
2	6
3	10
4	15
5	12
6	20
7	45
8	18
9	40
10	75
11	24
12	50
13	105
14	14
15	30
16	21
17	28
18	36
19	63
20	56
21	48
22	147
23	98
24	54
25	189
26	70
27	60
28	231
29	22
30	42
31	33
32	44
33	72
34	99
35	88
36	78
37	143
38	66
39	26
40	39
41	84
42	52
43	91
44	112
45	104
46	455
47	80
48	126
49	35
50	90
51	154
52	55
53	100
54	132
55	135
56	110
57	96
58	165
59	130
60	102
61	85
62	120
63	34
64	51
65	108
66	68
67	153
68	114