A359663 - cp's OEIS frontend

A359663 a(1) = 1; for n > 1, a(n) is the smallest positive number which has not appeared that shares a factor with the sum of the first n terms of the Champernowne string starting from 1.

n	a(n)
1	1
2	3
3	2
4	4
5	5
6	6
7	7
8	8
9	9
10	10
11	12
12	47
13	14
14	21
15	15
16	13
17	11
18	16
19	18
20	61
21	20
22	67
23	73
24	22
25	24
26	26
27	25
28	28
29	30
30	17
31	27
32	32
33	33
34	107
35	109
36	36
37	19
38	29
39	34
40	38
41	127
42	39
43	35
44	137
45	40
46	42
47	44
48	45
49	48
50	46
51	49
52	51
53	43
54	50
55	54
56	52
57	57
58	31
59	55
60	193
61	56
62	60
63	23
64	58
65	62
66	64
67	63
68	66
69	65
70	68
71	70
72	72
73	69
74	77
75	75
76	37

[1, 3, 2, 4, 5, 6, 7, 8, 9, 10, 12, 47, 14, 21, 15, 13, 11, 16, 18, 61, 20, 67, 73, 22, 24, 26, 25, 28, 30, 17, 27, 32, 33, 107, 109, 36, 19, 29, 34, 38, 127, 39, 35, 137, 40, 42, 44, 45, 48, 46, 49, 51, 43, 50, 54, 52, 57, 31, 55, 193, 56, 60, 23, 58, 62, 64, 63, 66, 65, 68, 70, 72, 69, 77, 75, 37]

cp's OEIS Frontend

A359663 a(1) = 1; for n > 1, a(n) is the smallest positive number which has not appeared that shares a factor with the sum of the first n terms of the Champernowne string starting from 1.

Table of values

List of values

n	a(n)
1	1
2	3
3	2
4	4
5	5
6	6
7	7
8	8
9	9
10	10
11	12
12	47
13	14
14	21
15	15
16	13
17	11
18	16
19	18
20	61
21	20
22	67
23	73
24	22
25	24
26	26
27	25
28	28
29	30
30	17
31	27
32	32
33	33
34	107
35	109
36	36
37	19
38	29
39	34
40	38
41	127
42	39
43	35
44	137
45	40
46	42
47	44
48	45
49	48
50	46
51	49
52	51
53	43
54	50
55	54
56	52
57	57
58	31
59	55
60	193
61	56
62	60
63	23
64	58
65	62
66	64
67	63
68	66
69	65
70	68
71	70
72	72
73	69
74	77
75	75
76	37

n	a(n)
1	1
2	3
3	2
4	4
5	5
6	6
7	7
8	8
9	9
10	10
11	12
12	47
13	14
14	21
15	15
16	13
17	11
18	16
19	18
20	61
21	20
22	67
23	73
24	22
25	24
26	26
27	25
28	28
29	30
30	17
31	27
32	32
33	33
34	107
35	109
36	36
37	19
38	29
39	34
40	38
41	127
42	39
43	35
44	137
45	40
46	42
47	44
48	45
49	48
50	46
51	49
52	51
53	43
54	50
55	54
56	52
57	57
58	31
59	55
60	193
61	56
62	60
63	23
64	58
65	62
66	64
67	63
68	66
69	65
70	68
71	70
72	72
73	69
74	77
75	75
76	37

n	a(n)
1	1
2	3
3	2
4	4
5	5
6	6
7	7
8	8
9	9
10	10
11	12
12	47
13	14
14	21
15	15
16	13
17	11
18	16
19	18
20	61
21	20
22	67
23	73
24	22
25	24
26	26
27	25
28	28
29	30
30	17
31	27
32	32
33	33
34	107
35	109
36	36
37	19
38	29
39	34
40	38
41	127
42	39
43	35
44	137
45	40
46	42
47	44
48	45
49	48
50	46
51	49
52	51
53	43
54	50
55	54
56	52
57	57
58	31
59	55
60	193
61	56
62	60
63	23
64	58
65	62
66	64
67	63
68	66
69	65
70	68
71	70
72	72
73	69
74	77
75	75
76	37