A166405 - cp's OEIS frontend

A166405 Sum of those positive i <= 2n+1, for which J(i,2n+1)=-1. Here J(i,k) is the Jacobi symbol.

n	a(n)
0	0
1	2
2	5
3	14
4	0
5	33
6	39
7	45
8	68
9	95
10	63
11	161
12	0
13	126
14	203
15	279
16	165
17	245
18	333
19	312
20	410
21	473
22	270
23	658
24	0
25	459
26	689
27	660
28	513
29	944
30	915
31	630
32	780
33	1139
34	759
35	1491
36	1314
37	775
38	1155
39	1738
40	0
41	1826
42	1360
43	1479
44	1958
45	1729
46	1395
47	2090
48	2328
49	1485
50	2525
51	2884

[0, 2, 5, 14, 0, 33, 39, 45, 68, 95, 63, 161, 0, 126, 203, 279, 165, 245, 333, 312, 410, 473, 270, 658, 0, 459, 689, 660, 513, 944, 915, 630, 780, 1139, 759, 1491, 1314, 775, 1155, 1738, 0, 1826, 1360, 1479, 1958, 1729, 1395, 2090, 2328, 1485, 2525, 2884]

cp's OEIS Frontend

A166405 Sum of those positive i <= 2n+1, for which J(i,2n+1)=-1. Here J(i,k) is the Jacobi symbol.

Table of values

List of values