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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.

A257296 Arithmetic mean of the digits of n, multiplied by 10^(d-1) and rounded down, where d is the number of digits of n.

Table of values

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

List of values

[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 30, 35, 40, 45, 50, 55, 60, 65]

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

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