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.

A030151 Numbers k such that in k^2 the parity of digits alternates.

Table of values

n a(n)
1 0
2 1
3 2
4 3
5 4
6 5
7 6
8 7
9 9
10 11
11 13
12 16
13 19
14 23
15 26
16 27
17 31
18 36
19 69
20 74
21 81
22 84
23 96
24 111
25 113
26 119
27 127
28 137
29 181
30 187
31 204
32 237
33 264
34 269
35 273
36 277
37 281
38 296
39 311
40 384
41 404
42 426
43 461
44 463
45 539
46 574
47 584
48 606
49 661
50 673
51 677
52 689
53 726
54 736
55 764
56 819

List of values

[0, 1, 2, 3, 4, 5, 6, 7, 9, 11, 13, 16, 19, 23, 26, 27, 31, 36, 69, 74, 81, 84, 96, 111, 113, 119, 127, 137, 181, 187, 204, 237, 264, 269, 273, 277, 281, 296, 311, 384, 404, 426, 461, 463, 539, 574, 584, 606, 661, 673, 677, 689, 726, 736, 764, 819]