A117000 - cp's OEIS frontend

A117000 a(n) = Sum_{d|n} Jacobi(2,d)*d.

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

[1, 1, -2, 1, -4, -2, 8, 1, 7, -4, -10, -2, -12, 8, 8, 1, 18, 7, -18, -4, -16, -10, 24, -2, 21, -12, -20, 8, -28, 8, 32, 1, 20, 18, -32, 7, -36, -18, 24, -4, 42, -16, -42, -10, -28, 24, 48, -2, 57, 21, -36, -12, -52, -20, 40, 8, 36, -28, -58, 8, -60, 32, 56, 1, 48, 20, -66, 18, -48, -32, 72, 7, 74, -36, -42, -18, -80, 24, 80, -4]

cp's OEIS Frontend

A117000 a(n) = Sum_{d|n} Jacobi(2,d)*d.

Table of values

List of values

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

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

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