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 | 3 |
| 2 | 8 |
| 3 | 12 |
| 4 | 28 |
| 5 | 58 |
| 6 | 142 |
| 7 | 350 |
| 8 | 906 |
| 9 | 2320 |
| 10 | 6056 |
| 11 | 15778 |
| 12 | 41024 |
| 13 | 107132 |
| 14 | 280184 |
| 15 | 732998 |
| 16 | 1918354 |
| 17 | 5019810 |
| 18 | 13141378 |
| 19 | 34398686 |
| 20 | 90045424 |
| 21 | 235729374 |
| 22 | 617126438 |
| 23 | 1615633560 |
| 24 | 4229774958 |
| 25 | 11073514332 |
| 26 | 28990794770 |
| 27 | 75898640094 |
| 28 | 198704554772 |