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 | 259 |
| 3 | 7335 |
| 4 | 86765 |
| 5 | 629174 |
| 6 | 3314178 |
| 7 | 13906578 |
| 8 | 49183590 |
| 9 | 152191935 |
| 10 | 422931613 |
| 11 | 1075761505 |
| 12 | 2540663307 |
| 13 | 5633367740 |
| 14 | 11829663860 |
| 15 | 23692442292 |
| 16 | 45516670332 |
| 17 | 84278105421 |
| 18 | 150996708135 |
| 19 | 262656041515 |
| 20 | 444856105561 |
| 21 | 735419759634 |
| 22 | 1189222877270 |