A204987 - cp's OEIS frontend

A204987 Least k such that n divides 2^k - 2^j for some j satisfying 1 <= j < k.

n	a(n)
1	2
2	2
3	3
4	3
5	5
6	3
7	4
8	4
9	7
10	5
11	11
12	4
13	13
14	4
15	5
16	5
17	9
18	7
19	19
20	6
21	7
22	11
23	12
24	5
25	21
26	13
27	19
28	5
29	29
30	5
31	6
32	6
33	11
34	9
35	13
36	8
37	37
38	19
39	13
40	7
41	21
42	7
43	15
44	12
45	13
46	12
47	24
48	6
49	22
50	21
51	9
52	14
53	53
54	19
55	21
56	6
57	19
58	29
59	59
60	6
61	61
62	6
63	7
64	7
65	13
66	11
67	67
68	10
69	23
70	13
71	36
72	9
73	10
74	37
75	21
76	20
77	31
78	13
79	40
80	8
81	55
82	21
83	83
84	8
85	9
86	15
87	29
88	13

[2, 2, 3, 3, 5, 3, 4, 4, 7, 5, 11, 4, 13, 4, 5, 5, 9, 7, 19, 6, 7, 11, 12, 5, 21, 13, 19, 5, 29, 5, 6, 6, 11, 9, 13, 8, 37, 19, 13, 7, 21, 7, 15, 12, 13, 12, 24, 6, 22, 21, 9, 14, 53, 19, 21, 6, 19, 29, 59, 6, 61, 6, 7, 7, 13, 11, 67, 10, 23, 13, 36, 9, 10, 37, 21, 20, 31, 13, 40, 8, 55, 21, 83, 8, 9, 15, 29, 13]

cp's OEIS Frontend

A204987 Least k such that n divides 2^k - 2^j for some j satisfying 1 <= j < k.

Table of values

List of values

n	a(n)
1	2
2	2
3	3
4	3
5	5
6	3
7	4
8	4
9	7
10	5
11	11
12	4
13	13
14	4
15	5
16	5
17	9
18	7
19	19
20	6
21	7
22	11
23	12
24	5
25	21
26	13
27	19
28	5
29	29
30	5
31	6
32	6
33	11
34	9
35	13
36	8
37	37
38	19
39	13
40	7
41	21
42	7
43	15
44	12
45	13
46	12
47	24
48	6
49	22
50	21
51	9
52	14
53	53
54	19
55	21
56	6
57	19
58	29
59	59
60	6
61	61
62	6
63	7
64	7
65	13
66	11
67	67
68	10
69	23
70	13
71	36
72	9
73	10
74	37
75	21
76	20
77	31
78	13
79	40
80	8
81	55
82	21
83	83
84	8
85	9
86	15
87	29
88	13

n	a(n)
1	2
2	2
3	3
4	3
5	5
6	3
7	4
8	4
9	7
10	5
11	11
12	4
13	13
14	4
15	5
16	5
17	9
18	7
19	19
20	6
21	7
22	11
23	12
24	5
25	21
26	13
27	19
28	5
29	29
30	5
31	6
32	6
33	11
34	9
35	13
36	8
37	37
38	19
39	13
40	7
41	21
42	7
43	15
44	12
45	13
46	12
47	24
48	6
49	22
50	21
51	9
52	14
53	53
54	19
55	21
56	6
57	19
58	29
59	59
60	6
61	61
62	6
63	7
64	7
65	13
66	11
67	67
68	10
69	23
70	13
71	36
72	9
73	10
74	37
75	21
76	20
77	31
78	13
79	40
80	8
81	55
82	21
83	83
84	8
85	9
86	15
87	29
88	13

n	a(n)
1	2
2	2
3	3
4	3
5	5
6	3
7	4
8	4
9	7
10	5
11	11
12	4
13	13
14	4
15	5
16	5
17	9
18	7
19	19
20	6
21	7
22	11
23	12
24	5
25	21
26	13
27	19
28	5
29	29
30	5
31	6
32	6
33	11
34	9
35	13
36	8
37	37
38	19
39	13
40	7
41	21
42	7
43	15
44	12
45	13
46	12
47	24
48	6
49	22
50	21
51	9
52	14
53	53
54	19
55	21
56	6
57	19
58	29
59	59
60	6
61	61
62	6
63	7
64	7
65	13
66	11
67	67
68	10
69	23
70	13
71	36
72	9
73	10
74	37
75	21
76	20
77	31
78	13
79	40
80	8
81	55
82	21
83	83
84	8
85	9
86	15
87	29
88	13