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.

A039411 Numbers whose base-10 representation has the same nonzero number of 2's and 4's.

Table of values

n a(n)
1 24
2 42
3 124
4 142
5 204
6 214
7 234
8 240
9 241
10 243
11 245
12 246
13 247
14 248
15 249
16 254
17 264
18 274
19 284
20 294
21 324
22 342
23 402
24 412
25 420
26 421
27 423
28 425
29 426
30 427
31 428
32 429
33 432
34 452
35 462
36 472
37 482
38 492
39 524
40 542
41 624
42 642
43 724
44 742
45 824
46 842
47 924
48 942
49 1024
50 1042

List of values

[24, 42, 124, 142, 204, 214, 234, 240, 241, 243, 245, 246, 247, 248, 249, 254, 264, 274, 284, 294, 324, 342, 402, 412, 420, 421, 423, 425, 426, 427, 428, 429, 432, 452, 462, 472, 482, 492, 524, 542, 624, 642, 724, 742, 824, 842, 924, 942, 1024, 1042]