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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.

A055961 a(n) = n - (reversal of base-11 digits of n) (written in base 10).

Table of values

n a(n)
0 0
1 0
2 0
3 0
4 0
5 0
6 0
7 0
8 0
9 0
10 0
11 10
12 0
13 -10
14 -20
15 -30
16 -40
17 -50
18 -60
19 -70
20 -80
21 -90
22 20
23 10
24 0
25 -10
26 -20
27 -30
28 -40
29 -50
30 -60
31 -70
32 -80
33 30
34 20
35 10
36 0
37 -10
38 -20
39 -30
40 -40
41 -50
42 -60
43 -70
44 40
45 30
46 20
47 10
48 0
49 -10
50 -20
51 -30
52 -40
53 -50
54 -60
55 50
56 40
57 30
58 20
59 10
60 0
61 -10
62 -20
63 -30
64 -40
65 -50
66 60
67 50
68 40
69 30
70 20
71 10
72 0
73 -10
74 -20
75 -30
76 -40

List of values

[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 10, 0, -10, -20, -30, -40, -50, -60, -70, -80, -90, 20, 10, 0, -10, -20, -30, -40, -50, -60, -70, -80, 30, 20, 10, 0, -10, -20, -30, -40, -50, -60, -70, 40, 30, 20, 10, 0, -10, -20, -30, -40, -50, -60, 50, 40, 30, 20, 10, 0, -10, -20, -30, -40, -50, 60, 50, 40, 30, 20, 10, 0, -10, -20, -30, -40]

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

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