A347113 - cp's OEIS frontend

A347113 a(1)=1; for n > 1, a(n) is the smallest unused positive number k such that k != j and gcd(k,j) != 1, where j = a(n-1) + 1.

n	a(n)
1	1
2	4
3	10
4	22
5	46
6	94
7	5
8	2
9	6
10	14
11	3
12	8
13	12
14	26
15	9
16	15
17	18
18	38
19	13
20	7
21	16
22	34
23	20
24	24
25	30
26	62
27	21
28	11
29	27
30	32
31	36
32	74
33	25
34	28
35	58
36	118
37	17
38	33
39	40
40	82
41	166
42	334
43	35
44	39
45	42
46	86
47	29
48	44
49	48
50	56
51	19
52	45
53	23
54	50
55	54
56	60
57	122
58	41
59	49
60	52
61	106
62	214
63	43
64	55
65	63
66	66

[1, 4, 10, 22, 46, 94, 5, 2, 6, 14, 3, 8, 12, 26, 9, 15, 18, 38, 13, 7, 16, 34, 20, 24, 30, 62, 21, 11, 27, 32, 36, 74, 25, 28, 58, 118, 17, 33, 40, 82, 166, 334, 35, 39, 42, 86, 29, 44, 48, 56, 19, 45, 23, 50, 54, 60, 122, 41, 49, 52, 106, 214, 43, 55, 63, 66]

cp's OEIS Frontend

A347113 a(1)=1; for n > 1, a(n) is the smallest unused positive number k such that k != j and gcd(k,j) != 1, where j = a(n-1) + 1.

Table of values

List of values

n	a(n)
1	1
2	4
3	10
4	22
5	46
6	94
7	5
8	2
9	6
10	14
11	3
12	8
13	12
14	26
15	9
16	15
17	18
18	38
19	13
20	7
21	16
22	34
23	20
24	24
25	30
26	62
27	21
28	11
29	27
30	32
31	36
32	74
33	25
34	28
35	58
36	118
37	17
38	33
39	40
40	82
41	166
42	334
43	35
44	39
45	42
46	86
47	29
48	44
49	48
50	56
51	19
52	45
53	23
54	50
55	54
56	60
57	122
58	41
59	49
60	52
61	106
62	214
63	43
64	55
65	63
66	66

n	a(n)
1	1
2	4
3	10
4	22
5	46
6	94
7	5
8	2
9	6
10	14
11	3
12	8
13	12
14	26
15	9
16	15
17	18
18	38
19	13
20	7
21	16
22	34
23	20
24	24
25	30
26	62
27	21
28	11
29	27
30	32
31	36
32	74
33	25
34	28
35	58
36	118
37	17
38	33
39	40
40	82
41	166
42	334
43	35
44	39
45	42
46	86
47	29
48	44
49	48
50	56
51	19
52	45
53	23
54	50
55	54
56	60
57	122
58	41
59	49
60	52
61	106
62	214
63	43
64	55
65	63
66	66

n	a(n)
1	1
2	4
3	10
4	22
5	46
6	94
7	5
8	2
9	6
10	14
11	3
12	8
13	12
14	26
15	9
16	15
17	18
18	38
19	13
20	7
21	16
22	34
23	20
24	24
25	30
26	62
27	21
28	11
29	27
30	32
31	36
32	74
33	25
34	28
35	58
36	118
37	17
38	33
39	40
40	82
41	166
42	334
43	35
44	39
45	42
46	86
47	29
48	44
49	48
50	56
51	19
52	45
53	23
54	50
55	54
56	60
57	122
58	41
59	49
60	52
61	106
62	214
63	43
64	55
65	63
66	66