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 | 14 |
| 3 | 155 |
| 4 | 1172 |
| 5 | 6843 |
| 6 | 43538 |
| 7 | 318457 |
| 8 | 2223803 |
| 9 | 14185700 |
| 10 | 84670477 |
| 11 | 477808607 |
| 12 | 2577052118 |
| 13 | 13759255632 |
| 14 | 75251167843 |
| 15 | 418157757456 |
| 16 | 2267313716636 |
| 17 | 11616142299625 |
| 18 | 55909713312571 |
| 19 | 257522103127082 |
| 20 | 1182251998919171 |
| 21 | 5791219719115580 |
| 22 | 32715779086392723 |