A347179 - cp's OEIS frontend

A347179 a(1) = 1; for n > 1, a(n) = smallest distinct positive integer such that gcd(a(n),a(n-k)) = 1, where k is each divisor of a(n) and n - k >= 1.

n	a(n)
1	1
2	2
3	3
4	5
5	4
6	7
7	9
8	8
9	11
10	13
11	10
12	17
13	15
14	14
15	19
16	23
17	16
18	21
19	25
20	26
21	29
22	31
23	22
24	27
25	37
26	20
27	41
28	33
29	28
30	39
31	43
32	32
33	47
34	49
35	34
36	45
37	53
38	35
39	58
40	51
41	59
42	46
43	61
44	55
45	57
46	62
47	65
48	67
49	69
50	38
51	71
52	73
53	50
54	77
55	79
56	64
57	75
58	83
59	44
60	85
61	81
62	76
63	87
64	89
65	56
66	97
67	63
68	68
69	91
70	95
71	74
72	93
73	101
74	52
75	103

[1, 2, 3, 5, 4, 7, 9, 8, 11, 13, 10, 17, 15, 14, 19, 23, 16, 21, 25, 26, 29, 31, 22, 27, 37, 20, 41, 33, 28, 39, 43, 32, 47, 49, 34, 45, 53, 35, 58, 51, 59, 46, 61, 55, 57, 62, 65, 67, 69, 38, 71, 73, 50, 77, 79, 64, 75, 83, 44, 85, 81, 76, 87, 89, 56, 97, 63, 68, 91, 95, 74, 93, 101, 52, 103]

cp's OEIS Frontend

A347179 a(1) = 1; for n > 1, a(n) = smallest distinct positive integer such that gcd(a(n),a(n-k)) = 1, where k is each divisor of a(n) and n - k >= 1.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	5
5	4
6	7
7	9
8	8
9	11
10	13
11	10
12	17
13	15
14	14
15	19
16	23
17	16
18	21
19	25
20	26
21	29
22	31
23	22
24	27
25	37
26	20
27	41
28	33
29	28
30	39
31	43
32	32
33	47
34	49
35	34
36	45
37	53
38	35
39	58
40	51
41	59
42	46
43	61
44	55
45	57
46	62
47	65
48	67
49	69
50	38
51	71
52	73
53	50
54	77
55	79
56	64
57	75
58	83
59	44
60	85
61	81
62	76
63	87
64	89
65	56
66	97
67	63
68	68
69	91
70	95
71	74
72	93
73	101
74	52
75	103

n	a(n)
1	1
2	2
3	3
4	5
5	4
6	7
7	9
8	8
9	11
10	13
11	10
12	17
13	15
14	14
15	19
16	23
17	16
18	21
19	25
20	26
21	29
22	31
23	22
24	27
25	37
26	20
27	41
28	33
29	28
30	39
31	43
32	32
33	47
34	49
35	34
36	45
37	53
38	35
39	58
40	51
41	59
42	46
43	61
44	55
45	57
46	62
47	65
48	67
49	69
50	38
51	71
52	73
53	50
54	77
55	79
56	64
57	75
58	83
59	44
60	85
61	81
62	76
63	87
64	89
65	56
66	97
67	63
68	68
69	91
70	95
71	74
72	93
73	101
74	52
75	103

n	a(n)
1	1
2	2
3	3
4	5
5	4
6	7
7	9
8	8
9	11
10	13
11	10
12	17
13	15
14	14
15	19
16	23
17	16
18	21
19	25
20	26
21	29
22	31
23	22
24	27
25	37
26	20
27	41
28	33
29	28
30	39
31	43
32	32
33	47
34	49
35	34
36	45
37	53
38	35
39	58
40	51
41	59
42	46
43	61
44	55
45	57
46	62
47	65
48	67
49	69
50	38
51	71
52	73
53	50
54	77
55	79
56	64
57	75
58	83
59	44
60	85
61	81
62	76
63	87
64	89
65	56
66	97
67	63
68	68
69	91
70	95
71	74
72	93
73	101
74	52
75	103