A071961 - cp's OEIS frontend

A071961 a(n) = Sum_{i=0..n} K(n, i) where K(x, y) is the Kronecker symbol (x / y).

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

[0, 2, 1, 0, 2, 0, 2, 4, 0, 6, 2, 2, 0, 0, 4, 6, 8, 0, 0, 2, 0, 0, 2, 6, 0, 20, 6, 0, 0, 0, 4, 12, 0, 0, 4, 4, 12, 0, 6, 12, 0, 0, 4, 0, 0, 0, 4, 10, 0, 42, 2, 4, 0, 0, 2, 18, 0, 0, 2, 6, 0, 0, 8, 2, 32, 0, 8, -2, 0, 0, 4, 14, 0, 0, 10, 4, 0, 0, 4, 22, 0, 54]

cp's OEIS Frontend

A071961 a(n) = Sum_{i=0..n} K(n, i) where K(x, y) is the Kronecker symbol (x / y).

Table of values

List of values

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

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

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