A074074 - cp's OEIS frontend

A074074 The numbers D in the set {D :=(2n+1)^2-4m^2, 1<=m<=n} that generate the smallest solution x to x^2 - D*y^2 = 1.

n	a(n)
1	5
2	21
3	33
4	17
5	105
6	105
7	189
8	33
9	105
10	405
11	333
12	141
13	473
14	57
15	817
16	189
17	325
18	885
19	77
20	1425
21	1173
22	1925
23	1425
24	2301
25	101
26	105
27	1425
28	333
29	777
30	1785
31	2525
32	381
33	1785
34	405
35	141
36	3393
37	2261
38	3813
39	6045
40	2717
41	4389
42	3129
43	2093
44	6765
45	885
46	5513
47	189
48	6045
49	197
50	8085

[5, 21, 33, 17, 105, 105, 189, 33, 105, 405, 333, 141, 473, 57, 817, 189, 325, 885, 77, 1425, 1173, 1925, 1425, 2301, 101, 105, 1425, 333, 777, 1785, 2525, 381, 1785, 405, 141, 3393, 2261, 3813, 6045, 2717, 4389, 3129, 2093, 6765, 885, 5513, 189, 6045, 197, 8085]

cp's OEIS Frontend

A074074 The numbers D in the set {D :=(2n+1)^2-4m^2, 1<=m<=n} that generate the smallest solution x to x^2 - D*y^2 = 1.

Table of values

List of values