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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A002185 Smallest primitive factor of 2^(2n+1) + 1.

Table of values

n a(n)
0 3
1 1
2 11
3 43
4 19
5 683
6 2731
7 331
8 43691
9 174763
10 5419
11 2796203
12 251
13 87211
14 59
15 715827883
16 67
17 281
18 1777
19 22366891
20 83
21 2932031007403
22 18837001
23 283
24 4363953127297
25 307
26 107
27 2971
28 571
29 2833
30 768614336404564651
31 77158673929
32 131
33 7327657
34 139
35 56409643
36 1753

List of values

[3, 1, 11, 43, 19, 683, 2731, 331, 43691, 174763, 5419, 2796203, 251, 87211, 59, 715827883, 67, 281, 1777, 22366891, 83, 2932031007403, 18837001, 283, 4363953127297, 307, 107, 2971, 571, 2833, 768614336404564651, 77158673929, 131, 7327657, 139, 56409643, 1753]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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