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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.

A090087 Smallest odd pseudoprimes to base n, not necessarily exceeding n. Compare with A007535 and A090086.

Table of values

n a(n)
1 9
2 341
3 91
4 15
5 217
6 35
7 25
8 9
9 91
10 9
11 15
12 65
13 21
14 15
15 341
16 15
17 9
18 25
19 9
20 21
21 55
22 21
23 33
24 25
25 39
26 9
27 65
28 9
29 15
30 49
31 15
32 25
33 85
34 15
35 9
36 35
37 9
38 39
39 95
40 39
41 15
42 205
43 21
44 9
45 133
46 9
47 65
48 49
49 15
50 21
51 25
52 51
53 9
54 55
55 9
56 15
57 25
58 57
59 15
60 341
61 15
62 9
63 341
64 9
65 33
66 65
67 33
68 25
69 35
70 69
71 9
72 85
73 9
74 15

List of values

[9, 341, 91, 15, 217, 35, 25, 9, 91, 9, 15, 65, 21, 15, 341, 15, 9, 25, 9, 21, 55, 21, 33, 25, 39, 9, 65, 9, 15, 49, 15, 25, 85, 15, 9, 35, 9, 39, 95, 39, 15, 205, 21, 9, 133, 9, 65, 49, 15, 21, 25, 51, 9, 55, 9, 15, 25, 57, 15, 341, 15, 9, 341, 9, 33, 65, 33, 25, 35, 69, 9, 85, 9, 15]

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

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