A071296 - cp's OEIS frontend

A071296 a(n) is the least m such that a period of the continued fraction expansion of sqrt(m) is 1,1,1,...,1,1,1,Z and there are n ones in the period (Z is 2*floor(sqrt(m))). If no such m exists, a(n) = 0.

n	a(n)
1	3
2	0
3	7
4	13
5	0
6	58
7	135
8	0
9	819
10	2081
11	0
12	13834
13	35955
14	0
15	244647
16	639389
17	0
18	4374866
19	11448871
20	0
21	78439683
22	205337953
23	0
24	1407271538
25	3684200835
26	0
27	25251313255
28	66108441037
29	0
30	453111560266
31	1186259960295
32	0
33	8130736409715
34	21286537898177
35	0

[3, 0, 7, 13, 0, 58, 135, 0, 819, 2081, 0, 13834, 35955, 0, 244647, 639389, 0, 4374866, 11448871, 0, 78439683, 205337953, 0, 1407271538, 3684200835, 0, 25251313255, 66108441037, 0, 453111560266, 1186259960295, 0, 8130736409715, 21286537898177, 0]

cp's OEIS Frontend

A071296 a(n) is the least m such that a period of the continued fraction expansion of sqrt(m) is 1,1,1,...,1,1,1,Z and there are n ones in the period (Z is 2*floor(sqrt(m))). If no such m exists, a(n) = 0.

Table of values

List of values