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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.

A253233 Smallest even pseudoprime (>2n+1) in base 2n+1.

Table of values

n a(n)
0 4
1 286
2 124
3 16806
4 28
5 70
6 244
7 742
8 1228
9 906
10 1852
11 154
12 28
13 286
14 52
15 66
16 496
17 442
18 66
19 1834
20 344
21 526974
22 76
23 506
24 66
25 70
26 286
27 1266
28 2296
29 946
30 130
31 5662
32 112
33 154
34 14246
35 370
36 276
37 8614
38 2806
39 2626
40 112
41 1558
42 276
43 2626
44 19126
45 1446
46 322
47 658
48 176
49 742
50 190
51 946
52 5356
53 742
54 186
55 190
56 176
57 8474
58 2806
59 2242
60 148

List of values

[4, 286, 124, 16806, 28, 70, 244, 742, 1228, 906, 1852, 154, 28, 286, 52, 66, 496, 442, 66, 1834, 344, 526974, 76, 506, 66, 70, 286, 1266, 2296, 946, 130, 5662, 112, 154, 14246, 370, 276, 8614, 2806, 2626, 112, 1558, 276, 2626, 19126, 1446, 322, 658, 176, 742, 190, 946, 5356, 742, 186, 190, 176, 8474, 2806, 2242, 148]

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

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