A325421 - cp's OEIS frontend

A325421 Numbers k coprime to 10 such that there are exactly two values of A for which k^2+4A and k^2-4A are perfect squares.

n	a(n)
1	169
2	289
3	507
4	841
5	867
6	1183
7	1369
8	1521
9	1681
10	1859
11	2023
12	2523
13	2601
14	2809
15	3179
16	3211
17	3549
18	3721
19	3887
20	4107
21	4563
22	5043
23	5239
24	5329
25	5491
26	5577
27	5887
28	6069
29	6647
30	7267
31	7569
32	7803
33	7921
34	7943
35	8281
36	8427
37	8959
38	9251
39	9409
40	9537
41	9583
42	9633
43	9971

[169, 289, 507, 841, 867, 1183, 1369, 1521, 1681, 1859, 2023, 2523, 2601, 2809, 3179, 3211, 3549, 3721, 3887, 4107, 4563, 5043, 5239, 5329, 5491, 5577, 5887, 6069, 6647, 7267, 7569, 7803, 7921, 7943, 8281, 8427, 8959, 9251, 9409, 9537, 9583, 9633, 9971]

cp's OEIS Frontend

A325421 Numbers k coprime to 10 such that there are exactly two values of A for which k^2+4A and k^2-4A are perfect squares.

Table of values

List of values

cp's OEIS Frontend

A325421 Numbers k coprime to 10 such that there are exactly two values of A for which k^2+4*A and k^2-4*A are perfect squares.

Table of values

List of values

A325421 Numbers k coprime to 10 such that there are exactly two values of A for which k^2+4A and k^2-4A are perfect squares.