A254931 - cp's OEIS frontend

A254931 Fundamental positive solution y = y2(n) of the second class of the Pell equation x^2 - 2*y^2 = A001132(n), n >= 1, (primes congruent to 1 or 7 mod 8).

n	a(n)
1	3
2	4
3	7
4	5
5	8
6	11
7	7
8	12
9	15
10	10
11	8
12	13
13	16
14	9
15	14
16	17
17	23
18	13
19	18
20	11
21	27
22	14
23	19
24	12
25	22
26	17
27	25
28	28
29	23
30	18
31	14
32	32
33	35
34	19
35	17
36	22
37	30
38	25
39	36
40	39
41	16
42	28
43	23
44	31
45	21
46	19
47	40
48	20
49	18
50	38

[3, 4, 7, 5, 8, 11, 7, 12, 15, 10, 8, 13, 16, 9, 14, 17, 23, 13, 18, 11, 27, 14, 19, 12, 22, 17, 25, 28, 23, 18, 14, 32, 35, 19, 17, 22, 30, 25, 36, 39, 16, 28, 23, 31, 21, 19, 40, 20, 18, 38]

cp's OEIS Frontend

A254931 Fundamental positive solution y = y2(n) of the second class of the Pell equation x^2 - 2*y^2 = A001132(n), n >= 1, (primes congruent to 1 or 7 mod 8).

Table of values

List of values

n	a(n)
1	3
2	4
3	7
4	5
5	8
6	11
7	7
8	12
9	15
10	10
11	8
12	13
13	16
14	9
15	14
16	17
17	23
18	13
19	18
20	11
21	27
22	14
23	19
24	12
25	22
26	17
27	25
28	28
29	23
30	18
31	14
32	32
33	35
34	19
35	17
36	22
37	30
38	25
39	36
40	39
41	16
42	28
43	23
44	31
45	21
46	19
47	40
48	20
49	18
50	38

n	a(n)
1	3
2	4
3	7
4	5
5	8
6	11
7	7
8	12
9	15
10	10
11	8
12	13
13	16
14	9
15	14
16	17
17	23
18	13
19	18
20	11
21	27
22	14
23	19
24	12
25	22
26	17
27	25
28	28
29	23
30	18
31	14
32	32
33	35
34	19
35	17
36	22
37	30
38	25
39	36
40	39
41	16
42	28
43	23
44	31
45	21
46	19
47	40
48	20
49	18
50	38

n	a(n)
1	3
2	4
3	7
4	5
5	8
6	11
7	7
8	12
9	15
10	10
11	8
12	13
13	16
14	9
15	14
16	17
17	23
18	13
19	18
20	11
21	27
22	14
23	19
24	12
25	22
26	17
27	25
28	28
29	23
30	18
31	14
32	32
33	35
34	19
35	17
36	22
37	30
38	25
39	36
40	39
41	16
42	28
43	23
44	31
45	21
46	19
47	40
48	20
49	18
50	38