A266697 - cp's OEIS frontend

A266697 Multiplicative order of 2^n mod 2*n+1.

n	a(n)
0	1
1	2
2	2
3	1
4	3
5	2
6	2
7	4
8	1
9	2
10	3
11	1
12	5
13	18
14	2
15	1
16	5
17	12
18	2
19	12
20	1
21	2
22	6
23	1
24	7
25	8
26	2
27	20
28	9
29	2
30	2
31	6
32	3
33	2
34	11
35	1
36	1
37	20
38	15
39	1
40	27
41	2
42	4
43	28
44	1
45	4
46	5
47	36
48	1
49	30
50	2
51	1
52	3
53	2
54	2
55	36
56	1
57	44
58	6
59	24
60	11
61	20
62	50
63	1
64	7
65	2
66	3
67	36
68	1
69	2
70	23
71	60
72	7
73	42
74	2
75	1
76	6
77	20
78	2

[1, 2, 2, 1, 3, 2, 2, 4, 1, 2, 3, 1, 5, 18, 2, 1, 5, 12, 2, 12, 1, 2, 6, 1, 7, 8, 2, 20, 9, 2, 2, 6, 3, 2, 11, 1, 1, 20, 15, 1, 27, 2, 4, 28, 1, 4, 5, 36, 1, 30, 2, 1, 3, 2, 2, 36, 1, 44, 6, 24, 11, 20, 50, 1, 7, 2, 3, 36, 1, 2, 23, 60, 7, 42, 2, 1, 6, 20, 2]

cp's OEIS Frontend

A266697 Multiplicative order of 2^n mod 2*n+1.

Table of values

List of values

n	a(n)
0	1
1	2
2	2
3	1
4	3
5	2
6	2
7	4
8	1
9	2
10	3
11	1
12	5
13	18
14	2
15	1
16	5
17	12
18	2
19	12
20	1
21	2
22	6
23	1
24	7
25	8
26	2
27	20
28	9
29	2
30	2
31	6
32	3
33	2
34	11
35	1
36	1
37	20
38	15
39	1
40	27
41	2
42	4
43	28
44	1
45	4
46	5
47	36
48	1
49	30
50	2
51	1
52	3
53	2
54	2
55	36
56	1
57	44
58	6
59	24
60	11
61	20
62	50
63	1
64	7
65	2
66	3
67	36
68	1
69	2
70	23
71	60
72	7
73	42
74	2
75	1
76	6
77	20
78	2

n	a(n)
0	1
1	2
2	2
3	1
4	3
5	2
6	2
7	4
8	1
9	2
10	3
11	1
12	5
13	18
14	2
15	1
16	5
17	12
18	2
19	12
20	1
21	2
22	6
23	1
24	7
25	8
26	2
27	20
28	9
29	2
30	2
31	6
32	3
33	2
34	11
35	1
36	1
37	20
38	15
39	1
40	27
41	2
42	4
43	28
44	1
45	4
46	5
47	36
48	1
49	30
50	2
51	1
52	3
53	2
54	2
55	36
56	1
57	44
58	6
59	24
60	11
61	20
62	50
63	1
64	7
65	2
66	3
67	36
68	1
69	2
70	23
71	60
72	7
73	42
74	2
75	1
76	6
77	20
78	2

n	a(n)
0	1
1	2
2	2
3	1
4	3
5	2
6	2
7	4
8	1
9	2
10	3
11	1
12	5
13	18
14	2
15	1
16	5
17	12
18	2
19	12
20	1
21	2
22	6
23	1
24	7
25	8
26	2
27	20
28	9
29	2
30	2
31	6
32	3
33	2
34	11
35	1
36	1
37	20
38	15
39	1
40	27
41	2
42	4
43	28
44	1
45	4
46	5
47	36
48	1
49	30
50	2
51	1
52	3
53	2
54	2
55	36
56	1
57	44
58	6
59	24
60	11
61	20
62	50
63	1
64	7
65	2
66	3
67	36
68	1
69	2
70	23
71	60
72	7
73	42
74	2
75	1
76	6
77	20
78	2