A227195 - cp's OEIS frontend

A227195 a(n) = one less than the first i >= 1 for which the Kronecker symbol K(i,n) is either 0 or -1. Or the maximal value u such that all K(1,n), K(2,n), ... up to K(u,n) have +1 as their values.

n	a(n)
2	1
3	1
4	1
5	1
6	1
7	2
8	1
9	2
10	1
11	1
12	1
13	1
14	1
15	2
16	1
17	2
18	1
19	1
20	1
21	1
22	1
23	4
24	1
25	4
26	1
27	1
28	1
29	1
30	1
31	2
32	1
33	2
34	1
35	1
36	1
37	1
38	1
39	2
40	1
41	2
42	1
43	1
44	1
45	1
46	1
47	4
48	1
49	6
50	1
51	1
52	1
53	1
54	1
55	2
56	1
57	2
58	1
59	1
60	1
61	1
62	1
63	2
64	1
65	2
66	1
67	1
68	1
69	1
70	1
71	6
72	1
73	4
74	1
75	1
76	1
77	1
78	1
79	2
80	1
81	2
82	1
83	1
84	1
85	1
86	1
87	2
88	1
89	2
90	1
91	1
92	1
93	1
94	1
95	4
96	1
97	4
98	1
99	1
100	1
101	1
102	1
103	2
104	1
105	2

[1, 1, 1, 1, 1, 2, 1, 2, 1, 1, 1, 1, 1, 2, 1, 2, 1, 1, 1, 1, 1, 4, 1, 4, 1, 1, 1, 1, 1, 2, 1, 2, 1, 1, 1, 1, 1, 2, 1, 2, 1, 1, 1, 1, 1, 4, 1, 6, 1, 1, 1, 1, 1, 2, 1, 2, 1, 1, 1, 1, 1, 2, 1, 2, 1, 1, 1, 1, 1, 6, 1, 4, 1, 1, 1, 1, 1, 2, 1, 2, 1, 1, 1, 1, 1, 2, 1, 2, 1, 1, 1, 1, 1, 4, 1, 4, 1, 1, 1, 1, 1, 2, 1, 2]

cp's OEIS Frontend

A227195 a(n) = one less than the first i >= 1 for which the Kronecker symbol K(i,n) is either 0 or -1. Or the maximal value u such that all K(1,n), K(2,n), ... up to K(u,n) have +1 as their values.

Table of values

List of values

n	a(n)
2	1
3	1
4	1
5	1
6	1
7	2
8	1
9	2
10	1
11	1
12	1
13	1
14	1
15	2
16	1
17	2
18	1
19	1
20	1
21	1
22	1
23	4
24	1
25	4
26	1
27	1
28	1
29	1
30	1
31	2
32	1
33	2
34	1
35	1
36	1
37	1
38	1
39	2
40	1
41	2
42	1
43	1
44	1
45	1
46	1
47	4
48	1
49	6
50	1
51	1
52	1
53	1
54	1
55	2
56	1
57	2
58	1
59	1
60	1
61	1
62	1
63	2
64	1
65	2
66	1
67	1
68	1
69	1
70	1
71	6
72	1
73	4
74	1
75	1
76	1
77	1
78	1
79	2
80	1
81	2
82	1
83	1
84	1
85	1
86	1
87	2
88	1
89	2
90	1
91	1
92	1
93	1
94	1
95	4
96	1
97	4
98	1
99	1
100	1
101	1
102	1
103	2
104	1
105	2

n	a(n)
2	1
3	1
4	1
5	1
6	1
7	2
8	1
9	2
10	1
11	1
12	1
13	1
14	1
15	2
16	1
17	2
18	1
19	1
20	1
21	1
22	1
23	4
24	1
25	4
26	1
27	1
28	1
29	1
30	1
31	2
32	1
33	2
34	1
35	1
36	1
37	1
38	1
39	2
40	1
41	2
42	1
43	1
44	1
45	1
46	1
47	4
48	1
49	6
50	1
51	1
52	1
53	1
54	1
55	2
56	1
57	2
58	1
59	1
60	1
61	1
62	1
63	2
64	1
65	2
66	1
67	1
68	1
69	1
70	1
71	6
72	1
73	4
74	1
75	1
76	1
77	1
78	1
79	2
80	1
81	2
82	1
83	1
84	1
85	1
86	1
87	2
88	1
89	2
90	1
91	1
92	1
93	1
94	1
95	4
96	1
97	4
98	1
99	1
100	1
101	1
102	1
103	2
104	1
105	2

n	a(n)
2	1
3	1
4	1
5	1
6	1
7	2
8	1
9	2
10	1
11	1
12	1
13	1
14	1
15	2
16	1
17	2
18	1
19	1
20	1
21	1
22	1
23	4
24	1
25	4
26	1
27	1
28	1
29	1
30	1
31	2
32	1
33	2
34	1
35	1
36	1
37	1
38	1
39	2
40	1
41	2
42	1
43	1
44	1
45	1
46	1
47	4
48	1
49	6
50	1
51	1
52	1
53	1
54	1
55	2
56	1
57	2
58	1
59	1
60	1
61	1
62	1
63	2
64	1
65	2
66	1
67	1
68	1
69	1
70	1
71	6
72	1
73	4
74	1
75	1
76	1
77	1
78	1
79	2
80	1
81	2
82	1
83	1
84	1
85	1
86	1
87	2
88	1
89	2
90	1
91	1
92	1
93	1
94	1
95	4
96	1
97	4
98	1
99	1
100	1
101	1
102	1
103	2
104	1
105	2