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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.

A286381 Compound filter: a(n) = P(A055881(n), A278236(n)), where P(n,k) is sequence A000027 used as a pairing function.

Table of values

n a(n)
1 2
2 5
3 16
4 12
5 67
6 9
7 16
8 23
9 436
10 80
11 1771
12 18
13 67
14 80
15 1771
16 668
17 16111
18 48
19 277
20 302
21 7141
22 2630
23 64621
24 14
25 16
26 23
27 436
28 80
29 1771
30 31
31 436
32 467
33 21946
34 1832
35 87991
36 94
37 1771
38 1832
39 87991
40 16292
41 793171
42 328
43 7141
44 7262
45 352381
46 64982
47 3173941
48 25
49 67
50 80
51 1771
52 668
53 16111
54 94
55 1771
56 1832
57 87991
58 16292
59 793171
60 706
61 16111
62 16292
63 793171
64 405452
65 19841851

List of values

[2, 5, 16, 12, 67, 9, 16, 23, 436, 80, 1771, 18, 67, 80, 1771, 668, 16111, 48, 277, 302, 7141, 2630, 64621, 14, 16, 23, 436, 80, 1771, 31, 436, 467, 21946, 1832, 87991, 94, 1771, 1832, 87991, 16292, 793171, 328, 7141, 7262, 352381, 64982, 3173941, 25, 67, 80, 1771, 668, 16111, 94, 1771, 1832, 87991, 16292, 793171, 706, 16111, 16292, 793171, 405452, 19841851]

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