A246921 - cp's OEIS frontend

A246921 Irregular triangular array: row n gives numbers D, each being the discriminant of the minimal polynomial of a quadratic irrational represented by a continued fraction with period an n-tuple of 1s and 3s.

n	a(n)
1	5
2	13
3	5
4	13
5	21
6	5
7	13
8	17
9	65
10	5
11	13
12	21
13	165
14	725
15	2805
16	5
17	13
18	445
19	1525
20	1853
21	5933
22	7925
23	30629
24	5
25	13
26	17
27	21
28	65
29	136
30	288
31	960
32	1260
33	4224
34	16128
35	21608
36	83520
37	5
38	13
39	3029
40	10205
41	11029
42	12773
43	28157
44	34973
45	42853
46	47965
47	53365
48	136165
49	184045

[5, 13, 5, 13, 21, 5, 13, 17, 65, 5, 13, 21, 165, 725, 2805, 5, 13, 445, 1525, 1853, 5933, 7925, 30629, 5, 13, 17, 21, 65, 136, 288, 960, 1260, 4224, 16128, 21608, 83520, 5, 13, 3029, 10205, 11029, 12773, 28157, 34973, 42853, 47965, 53365, 136165, 184045]

cp's OEIS Frontend

A246921 Irregular triangular array: row n gives numbers D, each being the discriminant of the minimal polynomial of a quadratic irrational represented by a continued fraction with period an n-tuple of 1s and 3s.

Table of values

List of values