cp's OEIS Frontend

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.

A109216 Smallest factor of 2^(2n+1)+(2n+1)^2.

Table of values

n a(n)
0 3
1 17
2 3
3 3
4 593
5 3
6 3
7 32993
8 3
9 3
10 2097593
11 3
12 3
13 73
14 3
15 3
16 8589935681
17 3
18 3
19 17
20 3
21 3
22 11
23 3
24 3
25 83
26 3
27 3
28 11
29 3
30 3
31 17
32 3
33 3
34 857
35 3
36 3
37 71329
38 3
39 3
40 59
41 3
42 3
43 19
44 3
45 3
46 11
47 3
48 3
49 17
50 3
51 3
52 4561633
53 3
54 3
55 2940725100673
56 3
57 3
58 193
59 3
60 3
61 1867
62 3
63 3
64 17
65 3
66 3
67 44449
68 3
69 3
70 19
71 3
72 3

List of values

[3, 17, 3, 3, 593, 3, 3, 32993, 3, 3, 2097593, 3, 3, 73, 3, 3, 8589935681, 3, 3, 17, 3, 3, 11, 3, 3, 83, 3, 3, 11, 3, 3, 17, 3, 3, 857, 3, 3, 71329, 3, 3, 59, 3, 3, 19, 3, 3, 11, 3, 3, 17, 3, 3, 4561633, 3, 3, 2940725100673, 3, 3, 193, 3, 3, 1867, 3, 3, 17, 3, 3, 44449, 3, 3, 19, 3, 3]