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.

A030143 Even numbers in which parity of digits alternates.

Table of values

n a(n)
1 0
2 2
3 4
4 6
5 8
6 10
7 12
8 14
9 16
10 18
11 30
12 32
13 34
14 36
15 38
16 50
17 52
18 54
19 56
20 58
21 70
22 72
23 74
24 76
25 78
26 90
27 92
28 94
29 96
30 98
31 210
32 212
33 214
34 216
35 218
36 230
37 232
38 234
39 236
40 238
41 250
42 252
43 254
44 256
45 258
46 270
47 272
48 274
49 276
50 278
51 290
52 292
53 294
54 296
55 298
56 410
57 412
58 414

List of values

[0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 30, 32, 34, 36, 38, 50, 52, 54, 56, 58, 70, 72, 74, 76, 78, 90, 92, 94, 96, 98, 210, 212, 214, 216, 218, 230, 232, 234, 236, 238, 250, 252, 254, 256, 258, 270, 272, 274, 276, 278, 290, 292, 294, 296, 298, 410, 412, 414]