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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.

A251558 a(n) = smallest odd number not in {A098550(1), A098550(2), ..., A098550(n)} which is neither a prime nor a term of A251542.

Table of values

n a(n)
1 9
2 9
3 9
4 9
5 15
6 15
7 21
8 21
9 21
10 21
11 21
12 21
13 21
14 21
15 21
16 21
17 27
18 27
19 33
20 33
21 33
22 33
23 33
24 45
25 45
26 49
27 49
28 49
29 49
30 49
31 49
32 49
33 49
34 49
35 49
36 49
37 49
38 49
39 49
40 57
41 57
42 57
43 57
44 57
45 57
46 57
47 69
48 69
49 75
50 75
51 75
52 75
53 75
54 75
55 77
56 77
57 77
58 77
59 77
60 77
61 77
62 77
63 77
64 77
65 77
66 77
67 77
68 105
69 105
70 105

List of values

[9, 9, 9, 9, 15, 15, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 27, 27, 33, 33, 33, 33, 33, 45, 45, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 57, 57, 57, 57, 57, 57, 57, 69, 69, 75, 75, 75, 75, 75, 75, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 77, 105, 105, 105]

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

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