A277847 - cp's OEIS frontend

A277847 Size of the largest subset of Z/nZ fixed by x -> x^2.

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

[1, 2, 2, 2, 2, 4, 4, 2, 4, 4, 6, 4, 4, 8, 4, 2, 2, 8, 10, 4, 8, 12, 12, 4, 6, 8, 10, 8, 8, 8, 16, 2, 12, 4, 8, 8, 10, 20, 8, 4, 6, 16, 22, 12, 8, 24, 24, 4, 22, 12, 4, 8, 14, 20, 12, 8, 20, 16, 30, 8, 16, 32, 16, 2, 8, 24, 34, 4, 24, 16, 36, 8, 10, 20, 12, 20, 24, 16, 40, 4, 28, 12, 42, 16, 4, 44]

cp's OEIS Frontend

A277847 Size of the largest subset of Z/nZ fixed by x -> x^2.

Table of values

List of values

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

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

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