A121215 - cp's OEIS frontend

A121215 a(1)=1. a(n) = n-th integer from among those positive integers which do not occur earlier in the sequence and which are not coprime to n.

n	a(n)
1	1
2	4
3	9
4	10
5	30
6	14
7	56
8	22
9	33
10	24
11	143
12	27
13	182
14	35
15	48
16	44
17	289
18	40
19	361
20	50
21	70
22	62
23	529
24	57
25	155
26	72
27	105
28	76
29	841
30	64
31	1023
32	96
33	114
34	94
35	140
36	84
37	1369
38	110
39	132
40	100
41	1681
42	90
43	1849
44	124
45	144
46	136
47	2256
48	112
49	406
50	128
51	180
52	154
53	2809
54	126
55	270
56	158
57	204
58	176

[1, 4, 9, 10, 30, 14, 56, 22, 33, 24, 143, 27, 182, 35, 48, 44, 289, 40, 361, 50, 70, 62, 529, 57, 155, 72, 105, 76, 841, 64, 1023, 96, 114, 94, 140, 84, 1369, 110, 132, 100, 1681, 90, 1849, 124, 144, 136, 2256, 112, 406, 128, 180, 154, 2809, 126, 270, 158, 204, 176]

cp's OEIS Frontend

A121215 a(1)=1. a(n) = n-th integer from among those positive integers which do not occur earlier in the sequence and which are not coprime to n.

Table of values

List of values