A098006 - cp's OEIS frontend

A098006 (p-1)/2 - phi(p-1) as p runs through the odd primes.

n	a(n)
2	0
3	0
4	1
5	1
6	2
7	0
8	3
9	1
10	2
11	7
12	6
13	4
14	9
15	1
16	2
17	1
18	14
19	13
20	11
21	12
22	15
23	1
24	4
25	16
26	10
27	19
28	1
29	18
30	8
31	27
32	17
33	4
34	25
35	2
36	35
37	30
38	27
39	1
40	2
41	1
42	42
43	23
44	32
45	14
46	39
47	57
48	39
49	1
50	42
51	4
52	23
53	56
54	25
55	0
56	1
57	2
58	63
59	50
60	44
61	49
62	2
63	57
64	35
65	60
66	2
67	85
68	72
69	1
70	62
71	16
72	1
73	63
74	66
75	81
76	1
77	2
78	78
79	40
80	76
81	29
82	114
83	47

[0, 0, 1, 1, 2, 0, 3, 1, 2, 7, 6, 4, 9, 1, 2, 1, 14, 13, 11, 12, 15, 1, 4, 16, 10, 19, 1, 18, 8, 27, 17, 4, 25, 2, 35, 30, 27, 1, 2, 1, 42, 23, 32, 14, 39, 57, 39, 1, 42, 4, 23, 56, 25, 0, 1, 2, 63, 50, 44, 49, 2, 57, 35, 60, 2, 85, 72, 1, 62, 16, 1, 63, 66, 81, 1, 2, 78, 40, 76, 29, 114, 47]

cp's OEIS Frontend

A098006 (p-1)/2 - phi(p-1) as p runs through the odd primes.

Table of values

List of values

n	a(n)
2	0
3	0
4	1
5	1
6	2
7	0
8	3
9	1
10	2
11	7
12	6
13	4
14	9
15	1
16	2
17	1
18	14
19	13
20	11
21	12
22	15
23	1
24	4
25	16
26	10
27	19
28	1
29	18
30	8
31	27
32	17
33	4
34	25
35	2
36	35
37	30
38	27
39	1
40	2
41	1
42	42
43	23
44	32
45	14
46	39
47	57
48	39
49	1
50	42
51	4
52	23
53	56
54	25
55	0
56	1
57	2
58	63
59	50
60	44
61	49
62	2
63	57
64	35
65	60
66	2
67	85
68	72
69	1
70	62
71	16
72	1
73	63
74	66
75	81
76	1
77	2
78	78
79	40
80	76
81	29
82	114
83	47

n	a(n)
2	0
3	0
4	1
5	1
6	2
7	0
8	3
9	1
10	2
11	7
12	6
13	4
14	9
15	1
16	2
17	1
18	14
19	13
20	11
21	12
22	15
23	1
24	4
25	16
26	10
27	19
28	1
29	18
30	8
31	27
32	17
33	4
34	25
35	2
36	35
37	30
38	27
39	1
40	2
41	1
42	42
43	23
44	32
45	14
46	39
47	57
48	39
49	1
50	42
51	4
52	23
53	56
54	25
55	0
56	1
57	2
58	63
59	50
60	44
61	49
62	2
63	57
64	35
65	60
66	2
67	85
68	72
69	1
70	62
71	16
72	1
73	63
74	66
75	81
76	1
77	2
78	78
79	40
80	76
81	29
82	114
83	47

n	a(n)
2	0
3	0
4	1
5	1
6	2
7	0
8	3
9	1
10	2
11	7
12	6
13	4
14	9
15	1
16	2
17	1
18	14
19	13
20	11
21	12
22	15
23	1
24	4
25	16
26	10
27	19
28	1
29	18
30	8
31	27
32	17
33	4
34	25
35	2
36	35
37	30
38	27
39	1
40	2
41	1
42	42
43	23
44	32
45	14
46	39
47	57
48	39
49	1
50	42
51	4
52	23
53	56
54	25
55	0
56	1
57	2
58	63
59	50
60	44
61	49
62	2
63	57
64	35
65	60
66	2
67	85
68	72
69	1
70	62
71	16
72	1
73	63
74	66
75	81
76	1
77	2
78	78
79	40
80	76
81	29
82	114
83	47