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 | 1 |
| 3 | 3 |
| 4 | 8 |
| 5 | 22 |
| 6 | 58 |
| 7 | 160 |
| 8 | 434 |
| 9 | 1204 |
| 10 | 3341 |
| 11 | 9363 |
| 12 | 26308 |
| 13 | 74376 |
| 14 | 210823 |
| 15 | 599832 |
| 16 | 1710803 |
| 17 | 4891876 |
| 18 | 14015505 |
| 19 | 40231632 |
| 20 | 115669419 |
| 21 | 333052242 |
| 22 | 960219982 |
| 23 | 2771707332 |
| 24 | 8009222307 |
| 25 | 23166563032 |
| 26 | 67069289457 |
| 27 | 194332834601 |