A342366 - cp's OEIS frontend

A342366 a(1) = 1, a(2) = 2; for n > 2, a(n) is the least positive integer not occurring earlier that shares a factor but not a digit with a(n-1).

n	a(n)
1	1
2	2
3	4
4	6
5	3
6	9
7	12
8	8
9	10
10	5
11	20
12	14
13	7
14	21
15	30
16	15
17	24
18	16
19	22
20	11
21	33
22	18
23	26
24	13
25	52
26	34
27	17
28	68
29	32
30	40
31	25
32	60
33	27
34	36
35	28
36	35
37	42
38	38
39	19
40	57
41	39
42	45
43	63
44	48
45	50
46	44
47	55
48	66
49	51
50	69
51	23
52	46
53	58
54	29
55	87
56	54
57	62
58	31
59	248
60	56
61	49
62	70
63	64
64	72
65	80
66	65
67	78
68	90
69	74
70	82
71	41
72	205
73	164
74	88
75	76
76	84

[1, 2, 4, 6, 3, 9, 12, 8, 10, 5, 20, 14, 7, 21, 30, 15, 24, 16, 22, 11, 33, 18, 26, 13, 52, 34, 17, 68, 32, 40, 25, 60, 27, 36, 28, 35, 42, 38, 19, 57, 39, 45, 63, 48, 50, 44, 55, 66, 51, 69, 23, 46, 58, 29, 87, 54, 62, 31, 248, 56, 49, 70, 64, 72, 80, 65, 78, 90, 74, 82, 41, 205, 164, 88, 76, 84]

cp's OEIS Frontend

A342366 a(1) = 1, a(2) = 2; for n > 2, a(n) is the least positive integer not occurring earlier that shares a factor but not a digit with a(n-1).

Table of values

List of values

n	a(n)
1	1
2	2
3	4
4	6
5	3
6	9
7	12
8	8
9	10
10	5
11	20
12	14
13	7
14	21
15	30
16	15
17	24
18	16
19	22
20	11
21	33
22	18
23	26
24	13
25	52
26	34
27	17
28	68
29	32
30	40
31	25
32	60
33	27
34	36
35	28
36	35
37	42
38	38
39	19
40	57
41	39
42	45
43	63
44	48
45	50
46	44
47	55
48	66
49	51
50	69
51	23
52	46
53	58
54	29
55	87
56	54
57	62
58	31
59	248
60	56
61	49
62	70
63	64
64	72
65	80
66	65
67	78
68	90
69	74
70	82
71	41
72	205
73	164
74	88
75	76
76	84

n	a(n)
1	1
2	2
3	4
4	6
5	3
6	9
7	12
8	8
9	10
10	5
11	20
12	14
13	7
14	21
15	30
16	15
17	24
18	16
19	22
20	11
21	33
22	18
23	26
24	13
25	52
26	34
27	17
28	68
29	32
30	40
31	25
32	60
33	27
34	36
35	28
36	35
37	42
38	38
39	19
40	57
41	39
42	45
43	63
44	48
45	50
46	44
47	55
48	66
49	51
50	69
51	23
52	46
53	58
54	29
55	87
56	54
57	62
58	31
59	248
60	56
61	49
62	70
63	64
64	72
65	80
66	65
67	78
68	90
69	74
70	82
71	41
72	205
73	164
74	88
75	76
76	84

n	a(n)
1	1
2	2
3	4
4	6
5	3
6	9
7	12
8	8
9	10
10	5
11	20
12	14
13	7
14	21
15	30
16	15
17	24
18	16
19	22
20	11
21	33
22	18
23	26
24	13
25	52
26	34
27	17
28	68
29	32
30	40
31	25
32	60
33	27
34	36
35	28
36	35
37	42
38	38
39	19
40	57
41	39
42	45
43	63
44	48
45	50
46	44
47	55
48	66
49	51
50	69
51	23
52	46
53	58
54	29
55	87
56	54
57	62
58	31
59	248
60	56
61	49
62	70
63	64
64	72
65	80
66	65
67	78
68	90
69	74
70	82
71	41
72	205
73	164
74	88
75	76
76	84