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 | 3 |
| 3 | 6 |
| 4 | 16 |
| 5 | 41 |
| 6 | 107 |
| 7 | 283 |
| 8 | 757 |
| 9 | 2043 |
| 10 | 5557 |
| 11 | 15216 |
| 12 | 41906 |
| 13 | 115999 |
| 14 | 322537 |
| 15 | 900406 |
| 16 | 2522616 |
| 17 | 7090307 |
| 18 | 19987069 |
| 19 | 56492426 |
| 20 | 160062636 |
| 21 | 454529595 |
| 22 | 1293394325 |
| 23 | 3687475479 |
| 24 | 10531663241 |
| 25 | 30128741717 |
| 26 | 86324342567 |
| 27 | 247691217352 |