A087000 - cp's OEIS frontend

A087000 Half length of periodic part of decimal expansion of 1/p for those primes having a periodic part of even length.

n	a(n)
1	3
2	1
3	3
4	8
5	9
6	11
7	14
8	23
9	29
10	30
11	4
12	22
13	48
14	2
15	17
16	54
17	56
18	21
19	65
20	4
21	23
22	74
23	39
24	83
25	89
26	90
27	96
28	49
29	15
30	111
31	114
32	116
33	15
34	25
35	128
36	131
37	134
38	14
39	73
40	156
41	55
42	168
43	58
44	16
45	183
46	93
47	189
48	191
49	194
50	100
51	102
52	209
53	70
54	216
55	16
56	76
57	230
58	77
59	243
60	245
61	249
62	251

[3, 1, 3, 8, 9, 11, 14, 23, 29, 30, 4, 22, 48, 2, 17, 54, 56, 21, 65, 4, 23, 74, 39, 83, 89, 90, 96, 49, 15, 111, 114, 116, 15, 25, 128, 131, 134, 14, 73, 156, 55, 168, 58, 16, 183, 93, 189, 191, 194, 100, 102, 209, 70, 216, 16, 76, 230, 77, 243, 245, 249, 251]

cp's OEIS Frontend

A087000 Half length of periodic part of decimal expansion of 1/p for those primes having a periodic part of even length.

Table of values

List of values

n	a(n)
1	3
2	1
3	3
4	8
5	9
6	11
7	14
8	23
9	29
10	30
11	4
12	22
13	48
14	2
15	17
16	54
17	56
18	21
19	65
20	4
21	23
22	74
23	39
24	83
25	89
26	90
27	96
28	49
29	15
30	111
31	114
32	116
33	15
34	25
35	128
36	131
37	134
38	14
39	73
40	156
41	55
42	168
43	58
44	16
45	183
46	93
47	189
48	191
49	194
50	100
51	102
52	209
53	70
54	216
55	16
56	76
57	230
58	77
59	243
60	245
61	249
62	251

n	a(n)
1	3
2	1
3	3
4	8
5	9
6	11
7	14
8	23
9	29
10	30
11	4
12	22
13	48
14	2
15	17
16	54
17	56
18	21
19	65
20	4
21	23
22	74
23	39
24	83
25	89
26	90
27	96
28	49
29	15
30	111
31	114
32	116
33	15
34	25
35	128
36	131
37	134
38	14
39	73
40	156
41	55
42	168
43	58
44	16
45	183
46	93
47	189
48	191
49	194
50	100
51	102
52	209
53	70
54	216
55	16
56	76
57	230
58	77
59	243
60	245
61	249
62	251

n	a(n)
1	3
2	1
3	3
4	8
5	9
6	11
7	14
8	23
9	29
10	30
11	4
12	22
13	48
14	2
15	17
16	54
17	56
18	21
19	65
20	4
21	23
22	74
23	39
24	83
25	89
26	90
27	96
28	49
29	15
30	111
31	114
32	116
33	15
34	25
35	128
36	131
37	134
38	14
39	73
40	156
41	55
42	168
43	58
44	16
45	183
46	93
47	189
48	191
49	194
50	100
51	102
52	209
53	70
54	216
55	16
56	76
57	230
58	77
59	243
60	245
61	249
62	251