A003960 - cp's OEIS frontend

A003960 Fully multiplicative with a(p) = [ (p+1)/2 ] for prime p.

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

[1, 1, 2, 1, 3, 2, 4, 1, 4, 3, 6, 2, 7, 4, 6, 1, 9, 4, 10, 3, 8, 6, 12, 2, 9, 7, 8, 4, 15, 6, 16, 1, 12, 9, 12, 4, 19, 10, 14, 3, 21, 8, 22, 6, 12, 12, 24, 2, 16, 9, 18, 7, 27, 8, 18, 4, 20, 15, 30, 6, 31, 16, 16, 1, 21, 12, 34, 9, 24, 12, 36, 4, 37, 19, 18, 10, 24, 14, 40, 3, 16, 21, 42, 8, 27]

cp's OEIS Frontend

A003960 Fully multiplicative with a(p) = [ (p+1)/2 ] for prime p.

Table of values

List of values

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

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

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