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 | 2 |
| 3 | 5 |
| 4 | 12 |
| 5 | 32 |
| 6 | 76 |
| 7 | 212 |
| 8 | 412 |
| 9 | 418 |
| 10 | 2305 |
| 11 | 5118 |
| 12 | 5516 |
| 13 | 49014 |
| 14 | 104902 |
| 15 | 261530 |
| 16 | 478638 |
| 17 | 1016483 |
| 18 | 2148745 |
| 19 | 4532050 |
| 20 | 9534639 |
| 21 | 20011894 |
| 22 | 41896466 |
| 23 | 87553703 |
| 24 | 182654692 |
| 25 | 380294962 |
| 26 | 790667861 |
| 27 | 1641499854 |
| 28 | 3403314157 |
| 29 | 7047273636 |
| 30 | 15889803538 |