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.

A329249 Starting from n: as long as the decimal representation starts with an odd number, multiply the largest such prefix by 2; a(n) corresponds to the final value.

Table of values

n a(n)
0 0
1 2
2 2
3 6
4 4
5 20
6 6
7 24
8 8
9 28
10 20
11 22
12 22
13 26
14 24
15 60
16 26
17 64
18 28
19 68
20 20
21 42
22 22
23 46
24 24
25 200
26 26
27 204
28 28
29 208
30 60
31 62
32 62
33 66
34 64
35 240
36 66
37 244
38 68
39 248
40 40
41 82
42 42
43 86
44 44
45 280
46 46
47 284
48 48
49 288
50 200
51 202
52 202
53 206
54 204
55 220
56 206
57 224
58 208
59 228
60 60
61 222

List of values

[0, 2, 2, 6, 4, 20, 6, 24, 8, 28, 20, 22, 22, 26, 24, 60, 26, 64, 28, 68, 20, 42, 22, 46, 24, 200, 26, 204, 28, 208, 60, 62, 62, 66, 64, 240, 66, 244, 68, 248, 40, 82, 42, 86, 44, 280, 46, 284, 48, 288, 200, 202, 202, 206, 204, 220, 206, 224, 208, 228, 60, 222]

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

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