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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.

A083447 a(n) = floor( n*R(n)/(n+R(n))), where R(n) is the digit reversal of n (A004086).

Table of values

n a(n)
2 1
3 1
4 2
5 2
6 3
7 3
8 4
9 4
10 0
11 5
12 7
13 9
14 10
15 11
16 12
17 13
18 14
19 15
20 1
21 7
22 11
23 13
24 15
25 16
26 18
27 19
28 20
29 22
30 2
31 9
32 13
33 16
34 18
35 21
36 22
37 24
38 26
39 27
40 3
41 10
42 15
43 18
44 22
45 24
46 26
47 28
48 30
49 32
50 4
51 11
52 16
53 21
54 24
55 27
56 30
57 32
58 34
59 36
60 5
61 12
62 18
63 22
64 26
65 30
66 33
67 35
68 37
69 40
70 6
71 13
72 19
73 24
74 28
75 32
76 35
77 38
78 41

List of values

[1, 1, 2, 2, 3, 3, 4, 4, 0, 5, 7, 9, 10, 11, 12, 13, 14, 15, 1, 7, 11, 13, 15, 16, 18, 19, 20, 22, 2, 9, 13, 16, 18, 21, 22, 24, 26, 27, 3, 10, 15, 18, 22, 24, 26, 28, 30, 32, 4, 11, 16, 21, 24, 27, 30, 32, 34, 36, 5, 12, 18, 22, 26, 30, 33, 35, 37, 40, 6, 13, 19, 24, 28, 32, 35, 38, 41]

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