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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.

A291757 a(n) = (1/2)*(2 + ((A003557(n)+A046523(n))^2) - A003557(n) - 3*A046523(n)).

Table of values

n a(n)
1 1
2 2
3 2
4 12
5 2
6 16
7 2
8 59
9 18
10 16
11 2
12 80
13 2
14 16
15 16
16 261
17 2
18 94
19 2
20 80
21 16
22 16
23 2
24 355
25 33
26 16
27 129
28 80
29 2
30 436
31 2
32 1097
33 16
34 16
35 16
36 826
37 2
38 16
39 16
40 355
41 2
42 436
43 2
44 80
45 94
46 16
47 2
48 1493
49 52
50 125
51 16
52 80
53 2
54 505
55 16
56 355
57 16
58 16
59 2
60 1832
61 2
62 16
63 94
64 4497
65 16
66 436
67 2
68 80
69 16
70 436
71 2
72 3415
73 2
74 16
75 125
76 80
77 16
78 436
79 2
80 1493
81 888
82 16
83 2
84 1832
85 16
86 16
87 16
88 355
89 2

List of values

[1, 2, 2, 12, 2, 16, 2, 59, 18, 16, 2, 80, 2, 16, 16, 261, 2, 94, 2, 80, 16, 16, 2, 355, 33, 16, 129, 80, 2, 436, 2, 1097, 16, 16, 16, 826, 2, 16, 16, 355, 2, 436, 2, 80, 94, 16, 2, 1493, 52, 125, 16, 80, 2, 505, 16, 355, 16, 16, 2, 1832, 2, 16, 94, 4497, 16, 436, 2, 80, 16, 436, 2, 3415, 2, 16, 125, 80, 16, 436, 2, 1493, 888, 16, 2, 1832, 16, 16, 16, 355, 2]

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