A368340 - cp's OEIS frontend

A368340 Take the solution to Pellian equation x^2 - 8ny^2 = 1 with smallest positive y and x >= 0; sequence gives a(n) = x, or 1 if n is twice a positive square. A368339 gives values of y.

n	a(n)
1	3
2	1
3	5
4	17
5	19
6	7
7	15
8	1
9	17
10	9
11	197
12	49
13	51
14	127
15	11
16	577
17	35
18	1
19	37
20	721
21	13
22	199
23	24335
24	97
25	99
26	649
27	485
28	15
29	19603
30	31
31	63
32	1
33	65
34	33
35	251
36	17
37	3699
38	57799
39	53
40	161
41	163
42	55
43	10405
44	77617
45	19
46	1151
47	2143295
48	4801
49	99
50	1
51	101
52	5201
53	32080051
54	1351
55	21
56	127

[3, 1, 5, 17, 19, 7, 15, 1, 17, 9, 197, 49, 51, 127, 11, 577, 35, 1, 37, 721, 13, 199, 24335, 97, 99, 649, 485, 15, 19603, 31, 63, 1, 65, 33, 251, 17, 3699, 57799, 53, 161, 163, 55, 10405, 77617, 19, 1151, 2143295, 4801, 99, 1, 101, 5201, 32080051, 1351, 21, 127]

cp's OEIS Frontend

A368340 Take the solution to Pellian equation x^2 - 8ny^2 = 1 with smallest positive y and x >= 0; sequence gives a(n) = x, or 1 if n is twice a positive square. A368339 gives values of y.

Table of values

List of values

cp's OEIS Frontend

A368340 Take the solution to Pellian equation x^2 - 8*n*y^2 = 1 with smallest positive y and x >= 0; sequence gives a(n) = x, or 1 if n is twice a positive square. A368339 gives values of y.

Table of values

List of values

A368340 Take the solution to Pellian equation x^2 - 8ny^2 = 1 with smallest positive y and x >= 0; sequence gives a(n) = x, or 1 if n is twice a positive square. A368339 gives values of y.