A082495 - cp's OEIS frontend

A082495 a(n) = (2^n - 1) mod n.

n	a(n)
1	0
2	1
3	1
4	3
5	1
6	3
7	1
8	7
9	7
10	3
11	1
12	3
13	1
14	3
15	7
16	15
17	1
18	9
19	1
20	15
21	7
22	3
23	1
24	15
25	6
26	3
27	25
28	15
29	1
30	3
31	1
32	31
33	7
34	3
35	17
36	27
37	1
38	3
39	7
40	15
41	1
42	21
43	1
44	15
45	16
46	3
47	1
48	15
49	29
50	23
51	7
52	15
53	1
54	27
55	42
56	31
57	7
58	3
59	1
60	15
61	1
62	3
63	7
64	63
65	31
66	63
67	1
68	15
69	7
70	43
71	1
72	63
73	1
74	3
75	67
76	15
77	17
78	63
79	1
80	15
81	79
82	3
83	1
84	63
85	31
86	3
87	7
88	79

[0, 1, 1, 3, 1, 3, 1, 7, 7, 3, 1, 3, 1, 3, 7, 15, 1, 9, 1, 15, 7, 3, 1, 15, 6, 3, 25, 15, 1, 3, 1, 31, 7, 3, 17, 27, 1, 3, 7, 15, 1, 21, 1, 15, 16, 3, 1, 15, 29, 23, 7, 15, 1, 27, 42, 31, 7, 3, 1, 15, 1, 3, 7, 63, 31, 63, 1, 15, 7, 43, 1, 63, 1, 3, 67, 15, 17, 63, 1, 15, 79, 3, 1, 63, 31, 3, 7, 79]

cp's OEIS Frontend

A082495 a(n) = (2^n - 1) mod n.

Table of values

List of values

n	a(n)
1	0
2	1
3	1
4	3
5	1
6	3
7	1
8	7
9	7
10	3
11	1
12	3
13	1
14	3
15	7
16	15
17	1
18	9
19	1
20	15
21	7
22	3
23	1
24	15
25	6
26	3
27	25
28	15
29	1
30	3
31	1
32	31
33	7
34	3
35	17
36	27
37	1
38	3
39	7
40	15
41	1
42	21
43	1
44	15
45	16
46	3
47	1
48	15
49	29
50	23
51	7
52	15
53	1
54	27
55	42
56	31
57	7
58	3
59	1
60	15
61	1
62	3
63	7
64	63
65	31
66	63
67	1
68	15
69	7
70	43
71	1
72	63
73	1
74	3
75	67
76	15
77	17
78	63
79	1
80	15
81	79
82	3
83	1
84	63
85	31
86	3
87	7
88	79

n	a(n)
1	0
2	1
3	1
4	3
5	1
6	3
7	1
8	7
9	7
10	3
11	1
12	3
13	1
14	3
15	7
16	15
17	1
18	9
19	1
20	15
21	7
22	3
23	1
24	15
25	6
26	3
27	25
28	15
29	1
30	3
31	1
32	31
33	7
34	3
35	17
36	27
37	1
38	3
39	7
40	15
41	1
42	21
43	1
44	15
45	16
46	3
47	1
48	15
49	29
50	23
51	7
52	15
53	1
54	27
55	42
56	31
57	7
58	3
59	1
60	15
61	1
62	3
63	7
64	63
65	31
66	63
67	1
68	15
69	7
70	43
71	1
72	63
73	1
74	3
75	67
76	15
77	17
78	63
79	1
80	15
81	79
82	3
83	1
84	63
85	31
86	3
87	7
88	79

n	a(n)
1	0
2	1
3	1
4	3
5	1
6	3
7	1
8	7
9	7
10	3
11	1
12	3
13	1
14	3
15	7
16	15
17	1
18	9
19	1
20	15
21	7
22	3
23	1
24	15
25	6
26	3
27	25
28	15
29	1
30	3
31	1
32	31
33	7
34	3
35	17
36	27
37	1
38	3
39	7
40	15
41	1
42	21
43	1
44	15
45	16
46	3
47	1
48	15
49	29
50	23
51	7
52	15
53	1
54	27
55	42
56	31
57	7
58	3
59	1
60	15
61	1
62	3
63	7
64	63
65	31
66	63
67	1
68	15
69	7
70	43
71	1
72	63
73	1
74	3
75	67
76	15
77	17
78	63
79	1
80	15
81	79
82	3
83	1
84	63
85	31
86	3
87	7
88	79