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 | 4 |
| 3 | 6 |
| 4 | 8 |
| 5 | 9 |
| 6 | 10 |
| 7 | 12 |
| 8 | 14 |
| 9 | 16 |
| 10 | 18 |
| 11 | 19 |
| 12 | 28 |
| 13 | 56 |
| 14 | 147 |
| 15 | 566 |
| 16 | 1301 |
| 17 | 4288 |
| 18 | 8576 |
| 19 | 13088 |
| 20 | 119396 |
| 21 | 518800 |
| 22 | 634825 |
| 23 | 654780 |
| 24 | 993476 |
| 25 | 2109420 |
| 26 | 3034105 |
| 27 | 6466772 |
| 28 | 17838948 |
| 29 | 80148824 |