A178154 - cp's OEIS frontend

A178154 Sum_{a=1..(p-1)/2} LegendreSymbol(a, p) for primes p == 3 (mod 4).

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

[1, 1, 3, 3, 3, 3, 3, 5, 9, 3, 7, 5, 9, 5, 9, 5, 15, 9, 7, 3, 11, 15, 13, 9, 9, 7, 15, 15, 21, 13, 11, 9, 9, 19, 9, 15, 19, 9, 9, 17, 27, 21, 15, 15, 7, 21, 25, 7, 27, 9, 21, 15, 9, 27, 15, 21, 25, 13, 15, 13, 9, 23, 33, 15, 15, 31, 13, 15, 21, 15, 15, 21, 9, 21, 33, 21, 21, 9, 29, 9, 31, 19]

cp's OEIS Frontend

A178154 Sum_{a=1..(p-1)/2} LegendreSymbol(a, p) for primes p == 3 (mod 4).

Table of values

List of values

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

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

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