A002343 - cp's OEIS frontend

A002343 Least positive integer y such that p = (x^2 - 5*y^2)/4 where p is the n-th odd prime such that 5 is a square mod p.

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

[1, 1, 1, 1, 2, 1, 2, 3, 1, 3, 1, 4, 1, 1, 2, 4, 5, 5, 1, 2, 3, 6, 3, 1, 5, 2, 4, 1, 7, 5, 3, 5, 7, 1, 5, 7, 3, 1, 4, 5, 6, 8, 1, 2, 7, 9, 4, 5, 3, 5, 2, 1, 9, 5, 6, 7, 10, 11, 3, 1, 4, 11, 6, 7, 8, 9, 7, 1, 4, 9, 5, 3, 8, 13, 3, 1, 4, 11, 1, 8, 2, 9, 10, 11, 13, 14, 7, 4, 5, 11, 7, 2, 10, 11, 15, 5, 9]

cp's OEIS Frontend

A002343 Least positive integer y such that p = (x^2 - 5*y^2)/4 where p is the n-th odd prime such that 5 is a square mod p.

Table of values

List of values

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

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

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