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 | 2 |
| 2 | 2 |
| 3 | 37 |
| 4 | 127 |
| 5 | 347 |
| 6 | 1087 |
| 7 | 3109 |
| 8 | 8419 |
| 9 | 24317 |
| 10 | 64553 |
| 11 | 175211 |
| 12 | 480881 |
| 13 | 1304707 |
| 14 | 3523901 |
| 15 | 9558533 |
| 16 | 25874843 |
| 17 | 70115473 |
| 18 | 189961529 |
| 19 | 514272533 |
| 20 | 1394193607 |
| 21 | 3779851091 |
| 22 | 10246935679 |
| 23 | 27788566133 |
| 24 | 75370121191 |
| 25 | 204475052401 |
| 26 | 554805820711 |
| 27 | 1505578023841 |
| 28 | 4086199302113 |