A255233 - cp's OEIS frontend

A255233 Fundamental positive solution x = x2(n) of the second class of the Pell equation x^2 - 2*y^2 = -A007522(n), n >= 1 (primes congruent to 7 mod 8).

n	a(n)
1	5
2	7
3	13
4	9
5	21
6	11
7	17
8	29
9	19
10	15
11	31
12	37
13	17
14	27
15	33
16	23
17	29
18	21
19	41
20	47
21	37
22	23
23	43
24	33
25	49
26	55
27	51
28	31
29	41
30	69
31	53
32	29
33	43
34	59
35	35
36	31
37	45
38	61
39	41
40	67
41	85
42	57
43	47
44	63
45	43
46	53
47	35
48	75
49	93
50	37
51	71
52	61
53	83
54	47
55	89
56	39
57	73
58	53
59	63
60	79
61	49
62	85
63	69
64	97
65	103
66	109
67	55
68	65
69	47
70	77
71	67
72	83
73	49

[5, 7, 13, 9, 21, 11, 17, 29, 19, 15, 31, 37, 17, 27, 33, 23, 29, 21, 41, 47, 37, 23, 43, 33, 49, 55, 51, 31, 41, 69, 53, 29, 43, 59, 35, 31, 45, 61, 41, 67, 85, 57, 47, 63, 43, 53, 35, 75, 93, 37, 71, 61, 83, 47, 89, 39, 73, 53, 63, 79, 49, 85, 69, 97, 103, 109, 55, 65, 47, 77, 67, 83, 49]

cp's OEIS Frontend

A255233 Fundamental positive solution x = x2(n) of the second class of the Pell equation x^2 - 2*y^2 = -A007522(n), n >= 1 (primes congruent to 7 mod 8).

Table of values

List of values

n	a(n)
1	5
2	7
3	13
4	9
5	21
6	11
7	17
8	29
9	19
10	15
11	31
12	37
13	17
14	27
15	33
16	23
17	29
18	21
19	41
20	47
21	37
22	23
23	43
24	33
25	49
26	55
27	51
28	31
29	41
30	69
31	53
32	29
33	43
34	59
35	35
36	31
37	45
38	61
39	41
40	67
41	85
42	57
43	47
44	63
45	43
46	53
47	35
48	75
49	93
50	37
51	71
52	61
53	83
54	47
55	89
56	39
57	73
58	53
59	63
60	79
61	49
62	85
63	69
64	97
65	103
66	109
67	55
68	65
69	47
70	77
71	67
72	83
73	49

n	a(n)
1	5
2	7
3	13
4	9
5	21
6	11
7	17
8	29
9	19
10	15
11	31
12	37
13	17
14	27
15	33
16	23
17	29
18	21
19	41
20	47
21	37
22	23
23	43
24	33
25	49
26	55
27	51
28	31
29	41
30	69
31	53
32	29
33	43
34	59
35	35
36	31
37	45
38	61
39	41
40	67
41	85
42	57
43	47
44	63
45	43
46	53
47	35
48	75
49	93
50	37
51	71
52	61
53	83
54	47
55	89
56	39
57	73
58	53
59	63
60	79
61	49
62	85
63	69
64	97
65	103
66	109
67	55
68	65
69	47
70	77
71	67
72	83
73	49

n	a(n)
1	5
2	7
3	13
4	9
5	21
6	11
7	17
8	29
9	19
10	15
11	31
12	37
13	17
14	27
15	33
16	23
17	29
18	21
19	41
20	47
21	37
22	23
23	43
24	33
25	49
26	55
27	51
28	31
29	41
30	69
31	53
32	29
33	43
34	59
35	35
36	31
37	45
38	61
39	41
40	67
41	85
42	57
43	47
44	63
45	43
46	53
47	35
48	75
49	93
50	37
51	71
52	61
53	83
54	47
55	89
56	39
57	73
58	53
59	63
60	79
61	49
62	85
63	69
64	97
65	103
66	109
67	55
68	65
69	47
70	77
71	67
72	83
73	49