A380671 - cp's OEIS frontend

A380671 a(n) is the smallest number not yet in the sequence which is coprime to n and shares at least one decimal digit with n.

n	a(n)
1	1
2	21
3	13
4	41
5	51
6	61
7	17
8	81
9	19
10	11
11	10
12	23
13	3
14	15
15	14
16	31
17	7
18	71
19	9
20	27
21	2
22	25
23	12
24	29
25	22
26	63
27	20
28	83
29	24
30	37
31	16
32	33
33	32
34	35
35	34
36	43
37	30
38	39
39	38
40	47
41	4
42	121
43	36
44	45
45	44
46	49
47	40
48	85
49	46
50	53
51	5
52	55
53	50
54	59
55	52
56	57
57	56
58	65
59	54
60	67
61	6
62	69
63	26
64	141
65	58
66	161
67	60

[1, 21, 13, 41, 51, 61, 17, 81, 19, 11, 10, 23, 3, 15, 14, 31, 7, 71, 9, 27, 2, 25, 12, 29, 22, 63, 20, 83, 24, 37, 16, 33, 32, 35, 34, 43, 30, 39, 38, 47, 4, 121, 36, 45, 44, 49, 40, 85, 46, 53, 5, 55, 50, 59, 52, 57, 56, 65, 54, 67, 6, 69, 26, 141, 58, 161, 60]

cp's OEIS Frontend

A380671 a(n) is the smallest number not yet in the sequence which is coprime to n and shares at least one decimal digit with n.

Table of values

List of values

n	a(n)
1	1
2	21
3	13
4	41
5	51
6	61
7	17
8	81
9	19
10	11
11	10
12	23
13	3
14	15
15	14
16	31
17	7
18	71
19	9
20	27
21	2
22	25
23	12
24	29
25	22
26	63
27	20
28	83
29	24
30	37
31	16
32	33
33	32
34	35
35	34
36	43
37	30
38	39
39	38
40	47
41	4
42	121
43	36
44	45
45	44
46	49
47	40
48	85
49	46
50	53
51	5
52	55
53	50
54	59
55	52
56	57
57	56
58	65
59	54
60	67
61	6
62	69
63	26
64	141
65	58
66	161
67	60

n	a(n)
1	1
2	21
3	13
4	41
5	51
6	61
7	17
8	81
9	19
10	11
11	10
12	23
13	3
14	15
15	14
16	31
17	7
18	71
19	9
20	27
21	2
22	25
23	12
24	29
25	22
26	63
27	20
28	83
29	24
30	37
31	16
32	33
33	32
34	35
35	34
36	43
37	30
38	39
39	38
40	47
41	4
42	121
43	36
44	45
45	44
46	49
47	40
48	85
49	46
50	53
51	5
52	55
53	50
54	59
55	52
56	57
57	56
58	65
59	54
60	67
61	6
62	69
63	26
64	141
65	58
66	161
67	60

n	a(n)
1	1
2	21
3	13
4	41
5	51
6	61
7	17
8	81
9	19
10	11
11	10
12	23
13	3
14	15
15	14
16	31
17	7
18	71
19	9
20	27
21	2
22	25
23	12
24	29
25	22
26	63
27	20
28	83
29	24
30	37
31	16
32	33
33	32
34	35
35	34
36	43
37	30
38	39
39	38
40	47
41	4
42	121
43	36
44	45
45	44
46	49
47	40
48	85
49	46
50	53
51	5
52	55
53	50
54	59
55	52
56	57
57	56
58	65
59	54
60	67
61	6
62	69
63	26
64	141
65	58
66	161
67	60