cp's OEIS Frontend

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.

A339023 Replace each digit d in the decimal representation of n with the digital root of n*d.

Table of values

n a(n)
0 0
1 1
2 4
3 9
4 7
5 7
6 9
7 4
8 1
9 9
10 10
11 22
12 36
13 43
14 52
15 63
16 76
17 82
18 99
19 19
20 40
21 63
22 88
23 16
24 36
25 58
26 73
27 99
28 28
29 49
30 90
31 34
32 61
33 99
34 31
35 64
36 99
37 37
38 67
39 99
40 70
41 25
42 63
43 13
44 55
45 99
46 46
47 85
48 36
49 79
50 70
51 36
52 85
53 46
54 99
55 55
56 13
57 63
58 25
59 79
60 90
61 67
62 37
63 99
64 64
65 31
66 99
67 61

List of values

[0, 1, 4, 9, 7, 7, 9, 4, 1, 9, 10, 22, 36, 43, 52, 63, 76, 82, 99, 19, 40, 63, 88, 16, 36, 58, 73, 99, 28, 49, 90, 34, 61, 99, 31, 64, 99, 37, 67, 99, 70, 25, 63, 13, 55, 99, 46, 85, 36, 79, 70, 36, 85, 46, 99, 55, 13, 63, 25, 79, 90, 67, 37, 99, 64, 31, 99, 61]

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

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