A255247 - cp's OEIS frontend

A255247 Fundamental positive solution x = x2(n) of the second class of the Pell equation x^2 - 2*y^2 = -A001132(n), n>=1 (primes congruent to {1,7} mod 8).

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

[5, 9, 7, 13, 11, 9, 21, 13, 11, 19, 25, 17, 15, 29, 21, 19, 15, 31, 23, 37, 17, 35, 27, 41, 25, 33, 23, 21, 29, 37, 49, 23, 21, 41, 47, 39, 29, 37, 25, 23, 57, 35, 43, 33, 49, 55, 27, 59, 65, 33, 51, 43, 31, 29, 41, 49, 69, 55, 53, 29, 43, 59, 51, 41, 37, 35]

cp's OEIS Frontend

A255247 Fundamental positive solution x = x2(n) of the second class of the Pell equation x^2 - 2*y^2 = -A001132(n), n>=1 (primes congruent to {1,7} mod 8).

Table of values

List of values

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

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

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