A255235 - cp's OEIS frontend

A255235 Fundamental positive solution x = x1(n) of the first class of the Pell equation x^2 - 2*y^2 = -A038873(n), n>=1 (primes congruent to {1,2,7} mod 8).

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

[4, 1, 1, 3, 1, 3, 5, 1, 5, 7, 3, 1, 5, 7, 1, 5, 7, 11, 3, 7, 1, 13, 3, 7, 1, 9, 5, 11, 13, 9, 5, 1, 15, 17, 5, 3, 7, 13, 9, 17, 19, 1, 11, 7, 13, 5, 3, 19, 3, 1, 17, 7, 11, 19, 21, 13, 9, 1, 7, 9, 25, 15, 7, 11, 17, 21, 23, 27, 5]

cp's OEIS Frontend

A255235 Fundamental positive solution x = x1(n) of the first class of the Pell equation x^2 - 2*y^2 = -A038873(n), n>=1 (primes congruent to {1,2,7} mod 8).

Table of values

List of values

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

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

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