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.

A030142 Odd numbers in which parity of digits alternates.

Table of values

n a(n)
1 1
2 3
3 5
4 7
5 9
6 21
7 23
8 25
9 27
10 29
11 41
12 43
13 45
14 47
15 49
16 61
17 63
18 65
19 67
20 69
21 81
22 83
23 85
24 87
25 89
26 101
27 103
28 105
29 107
30 109
31 121
32 123
33 125
34 127
35 129
36 141
37 143
38 145
39 147
40 149
41 161
42 163
43 165
44 167
45 169
46 181
47 183
48 185
49 187
50 189
51 301
52 303
53 305
54 307
55 309
56 321
57 323

List of values

[1, 3, 5, 7, 9, 21, 23, 25, 27, 29, 41, 43, 45, 47, 49, 61, 63, 65, 67, 69, 81, 83, 85, 87, 89, 101, 103, 105, 107, 109, 121, 123, 125, 127, 129, 141, 143, 145, 147, 149, 161, 163, 165, 167, 169, 181, 183, 185, 187, 189, 301, 303, 305, 307, 309, 321, 323]