A083849 - cp's OEIS frontend

A083849 a(n) is the largest prime of the form x^2 + 1 <= 2^n.

n	a(n)
1	2
2	2
3	5
4	5
5	17
6	37
7	101
8	197
9	401
10	677
11	1601
12	3137
13	8101
14	15877
15	32401
16	62501
17	122501
18	246017
19	512657
20	1020101
21	2073601
22	4137157
23	8386817
24	16695397
25	33339077
26	66977857
27	133772357
28	268304401
29	536663557
30	1073610757
31	2146098277

[2, 2, 5, 5, 17, 37, 101, 197, 401, 677, 1601, 3137, 8101, 15877, 32401, 62501, 122501, 246017, 512657, 1020101, 2073601, 4137157, 8386817, 16695397, 33339077, 66977857, 133772357, 268304401, 536663557, 1073610757, 2146098277]

cp's OEIS Frontend

A083849 a(n) is the largest prime of the form x^2 + 1 <= 2^n.

Table of values

List of values