A071932 - cp's OEIS frontend

A071932 a(n) = 4*Sum_{i=1..n} K(i,i+1) - n, where K(x,y) is the Kronecker symbol (x/y).

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

[1, 4, 7, 2, 5, 8, 11, 6, 1, 4, 7, 2, 5, 8, 11, 6, 9, 12, 15, 10, 5, 8, 11, 6, 1, 4, 7, 2, 5, 8, 11, 6, 9, 12, 15, 10, 13, 16, 19, 14, 9, 12, 15, 10, 5, 8, 11, 6, 9, 12, 15, 10, 5, 8, 11, 6, 1, 4, 7, 2, 5, 8, 11, 6, 9, 12, 15, 10, 13, 16, 19, 14, 9, 12, 15, 10, 13, 16, 19, 14, 17, 20, 23]

cp's OEIS Frontend

A071932 a(n) = 4*Sum_{i=1..n} K(i,i+1) - n, where K(x,y) is the Kronecker symbol (x/y).

Table of values

List of values

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

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

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