A031628 - cp's OEIS frontend

A031628 Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 40.

n	a(n)
1	401
2	10429
3	20498
4	32842
5	33937
6	68813
7	90826
8	92641
9	94474
10	178525
11	180217
12	213973
13	214898
14	216754
15	251626
16	252629
17	253634
18	254641
19	256661
20	257674
21	259706
22	262769
23	344237
24	346585
25	348941
26	353677
27	386602
28	392837
29	396602
30	400385
31	439333
32	443314
33	449989

[401, 10429, 20498, 32842, 33937, 68813, 90826, 92641, 94474, 178525, 180217, 213973, 214898, 216754, 251626, 252629, 253634, 254641, 256661, 257674, 259706, 262769, 344237, 346585, 348941, 353677, 386602, 392837, 396602, 400385, 439333, 443314, 449989]

cp's OEIS Frontend

A031628 Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 40.

Table of values

List of values