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 | 1 |
| 1 | 3 |
| 2 | 8 |
| 3 | 23 |
| 4 | 74 |
| 5 | 257 |
| 6 | 930 |
| 7 | 3439 |
| 8 | 12878 |
| 9 | 48629 |
| 10 | 184766 |
| 11 | 705443 |
| 12 | 2704168 |
| 13 | 10400613 |
| 14 | 40116614 |
| 15 | 155117535 |
| 16 | 601080406 |
| 17 | 2333606237 |
| 18 | 9075135318 |
| 19 | 35345263819 |
| 20 | 137846528840 |
| 21 | 538257874461 |
| 22 | 2104098963742 |
| 23 | 8233430727623 |
| 24 | 32247603683124 |
| 25 | 126410606437777 |
| 26 | 495918532948130 |