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.
| n | a(n) |
|---|---|
| 0 | 3 |
| 1 | 22 |
| 2 | 22 |
| 3 | 201 |
| 4 | 333 |
| 5 | 355 |
| 6 | 355 |
| 7 | 75948 |
| 8 | 100798 |
| 9 | 103993 |
| 10 | 312689 |
| 11 | 833719 |
| 12 | 4272943 |
| 13 | 5419351 |
| 14 | 58466453 |
| 15 | 80143857 |
| 16 | 245850922 |
| 17 | 1068966896 |
| 18 | 2549491779 |
| 19 | 6167950454 |
| 20 | 21053343141 |
| 21 | 21053343141 |
| 22 | 1299139324288 |
| 23 | 1741259530249 |
| 24 | 3587785776203 |
| 25 | 8958937768937 |
| 26 | 8958937768937 |
| 27 | 130796280757852 |