A113552 - cp's OEIS frontend

A113552 Beginning with 1, least divisor of the previous term not included earlier, otherwise the least multiple of the previous term having at least one prime divisor coprime to it and not included earlier.

n	a(n)
1	1
2	2
3	6
4	3
5	12
6	4
7	20
8	5
9	10
10	30
11	15
12	60
13	420
14	7
15	14
16	42
17	21
18	84
19	28
20	140
21	35
22	70
23	210
24	105
25	630
26	9
27	18
28	90
29	45
30	180
31	36
32	252
33	63
34	126
35	1260
36	315
37	1890
38	27
39	54
40	270
41	135
42	540
43	108
44	756
45	189
46	378
47	3780
48	945
49	5670
50	81
51	162
52	810
53	405
54	1620
55	324
56	2268
57	567
58	1134
59	11340
60	2835

[1, 2, 6, 3, 12, 4, 20, 5, 10, 30, 15, 60, 420, 7, 14, 42, 21, 84, 28, 140, 35, 70, 210, 105, 630, 9, 18, 90, 45, 180, 36, 252, 63, 126, 1260, 315, 1890, 27, 54, 270, 135, 540, 108, 756, 189, 378, 3780, 945, 5670, 81, 162, 810, 405, 1620, 324, 2268, 567, 1134, 11340, 2835]

cp's OEIS Frontend

A113552 Beginning with 1, least divisor of the previous term not included earlier, otherwise the least multiple of the previous term having at least one prime divisor coprime to it and not included earlier.

Table of values

List of values