A028416 - cp's OEIS frontend

A028416 Primes p such that the decimal expansion of 1/p has a periodic part of even length.

n	a(n)
1	7
2	11
3	13
4	17
5	19
6	23
7	29
8	47
9	59
10	61
11	73
12	89
13	97
14	101
15	103
16	109
17	113
18	127
19	131
20	137
21	139
22	149
23	157
24	167
25	179
26	181
27	193
28	197
29	211
30	223
31	229
32	233
33	241
34	251
35	257
36	263
37	269
38	281
39	293
40	313
41	331
42	337
43	349
44	353
45	367
46	373
47	379
48	383
49	389
50	401
51	409
52	419
53	421
54	433

[7, 11, 13, 17, 19, 23, 29, 47, 59, 61, 73, 89, 97, 101, 103, 109, 113, 127, 131, 137, 139, 149, 157, 167, 179, 181, 193, 197, 211, 223, 229, 233, 241, 251, 257, 263, 269, 281, 293, 313, 331, 337, 349, 353, 367, 373, 379, 383, 389, 401, 409, 419, 421, 433]

cp's OEIS Frontend

A028416 Primes p such that the decimal expansion of 1/p has a periodic part of even length.

Table of values

List of values

n	a(n)
1	7
2	11
3	13
4	17
5	19
6	23
7	29
8	47
9	59
10	61
11	73
12	89
13	97
14	101
15	103
16	109
17	113
18	127
19	131
20	137
21	139
22	149
23	157
24	167
25	179
26	181
27	193
28	197
29	211
30	223
31	229
32	233
33	241
34	251
35	257
36	263
37	269
38	281
39	293
40	313
41	331
42	337
43	349
44	353
45	367
46	373
47	379
48	383
49	389
50	401
51	409
52	419
53	421
54	433

n	a(n)
1	7
2	11
3	13
4	17
5	19
6	23
7	29
8	47
9	59
10	61
11	73
12	89
13	97
14	101
15	103
16	109
17	113
18	127
19	131
20	137
21	139
22	149
23	157
24	167
25	179
26	181
27	193
28	197
29	211
30	223
31	229
32	233
33	241
34	251
35	257
36	263
37	269
38	281
39	293
40	313
41	331
42	337
43	349
44	353
45	367
46	373
47	379
48	383
49	389
50	401
51	409
52	419
53	421
54	433

n	a(n)
1	7
2	11
3	13
4	17
5	19
6	23
7	29
8	47
9	59
10	61
11	73
12	89
13	97
14	101
15	103
16	109
17	113
18	127
19	131
20	137
21	139
22	149
23	157
24	167
25	179
26	181
27	193
28	197
29	211
30	223
31	229
32	233
33	241
34	251
35	257
36	263
37	269
38	281
39	293
40	313
41	331
42	337
43	349
44	353
45	367
46	373
47	379
48	383
49	389
50	401
51	409
52	419
53	421
54	433