A362842 - cp's OEIS frontend

A362842 a(1) = 1; a(2) = 2; for n > 2, a(n) is the smallest positive number that has not yet appeared that shares a factor with a(n-1) when both a(n-1) and a(n) are read as numbers in bases from one more than the maximum digit in a(n-1) and a(n), up to base 10.

n	a(n)
1	1
2	2
3	4
4	6
5	3
6	9
7	12
8	24
9	8
10	20
11	10
12	30
13	33
14	11
15	22
16	26
17	13
18	39
19	15
20	48
21	28
22	14
23	49
24	7
25	70
26	16
27	38
28	19
29	57
30	69
31	18
32	56
33	76
34	36
35	60
36	40
37	42
38	21
39	63
40	66
41	44
42	46
43	23
44	92
45	32
46	64
47	62
48	31
49	93
50	27
51	90
52	5
53	50
54	55
55	77
56	84
57	35
58	80
59	68
60	17
61	119
62	34
63	94
64	47
65	329
66	91
67	52
68	96
69	45
70	95
71	25
72	190
73	54
74	98
75	58
76	29

[1, 2, 4, 6, 3, 9, 12, 24, 8, 20, 10, 30, 33, 11, 22, 26, 13, 39, 15, 48, 28, 14, 49, 7, 70, 16, 38, 19, 57, 69, 18, 56, 76, 36, 60, 40, 42, 21, 63, 66, 44, 46, 23, 92, 32, 64, 62, 31, 93, 27, 90, 5, 50, 55, 77, 84, 35, 80, 68, 17, 119, 34, 94, 47, 329, 91, 52, 96, 45, 95, 25, 190, 54, 98, 58, 29]

cp's OEIS Frontend

A362842 a(1) = 1; a(2) = 2; for n > 2, a(n) is the smallest positive number that has not yet appeared that shares a factor with a(n-1) when both a(n-1) and a(n) are read as numbers in bases from one more than the maximum digit in a(n-1) and a(n), up to base 10.

Table of values

List of values

n	a(n)
1	1
2	2
3	4
4	6
5	3
6	9
7	12
8	24
9	8
10	20
11	10
12	30
13	33
14	11
15	22
16	26
17	13
18	39
19	15
20	48
21	28
22	14
23	49
24	7
25	70
26	16
27	38
28	19
29	57
30	69
31	18
32	56
33	76
34	36
35	60
36	40
37	42
38	21
39	63
40	66
41	44
42	46
43	23
44	92
45	32
46	64
47	62
48	31
49	93
50	27
51	90
52	5
53	50
54	55
55	77
56	84
57	35
58	80
59	68
60	17
61	119
62	34
63	94
64	47
65	329
66	91
67	52
68	96
69	45
70	95
71	25
72	190
73	54
74	98
75	58
76	29

n	a(n)
1	1
2	2
3	4
4	6
5	3
6	9
7	12
8	24
9	8
10	20
11	10
12	30
13	33
14	11
15	22
16	26
17	13
18	39
19	15
20	48
21	28
22	14
23	49
24	7
25	70
26	16
27	38
28	19
29	57
30	69
31	18
32	56
33	76
34	36
35	60
36	40
37	42
38	21
39	63
40	66
41	44
42	46
43	23
44	92
45	32
46	64
47	62
48	31
49	93
50	27
51	90
52	5
53	50
54	55
55	77
56	84
57	35
58	80
59	68
60	17
61	119
62	34
63	94
64	47
65	329
66	91
67	52
68	96
69	45
70	95
71	25
72	190
73	54
74	98
75	58
76	29

n	a(n)
1	1
2	2
3	4
4	6
5	3
6	9
7	12
8	24
9	8
10	20
11	10
12	30
13	33
14	11
15	22
16	26
17	13
18	39
19	15
20	48
21	28
22	14
23	49
24	7
25	70
26	16
27	38
28	19
29	57
30	69
31	18
32	56
33	76
34	36
35	60
36	40
37	42
38	21
39	63
40	66
41	44
42	46
43	23
44	92
45	32
46	64
47	62
48	31
49	93
50	27
51	90
52	5
53	50
54	55
55	77
56	84
57	35
58	80
59	68
60	17
61	119
62	34
63	94
64	47
65	329
66	91
67	52
68	96
69	45
70	95
71	25
72	190
73	54
74	98
75	58
76	29