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) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 11 |
| 4 | 34 |
| 5 | 111 |
| 6 | 361 |
| 7 | 1172 |
| 8 | 3809 |
| 9 | 12377 |
| 10 | 40218 |
| 11 | 130687 |
| 12 | 424661 |
| 13 | 1379916 |
| 14 | 4483973 |
| 15 | 14570461 |
| 16 | 47346034 |
| 17 | 153848731 |
| 18 | 499924281 |
| 19 | 1624480652 |
| 20 | 5278674169 |
| 21 | 17152805697 |
| 22 | 55737242698 |
| 23 | 181115572487 |
| 24 | 588526611821 |
| 25 | 1912389796556 |
| 26 | 6214221516093 |