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 | 35 |
| 2 | 1225 |
| 3 | 2233 |
| 4 | 14825 |
| 5 | 49586 |
| 6 | 119278 |
| 7 | 618202 |
| 8 | 2332602 |
| 9 | 6535778 |
| 10 | 28238814 |
| 11 | 110355600 |
| 12 | 342679500 |
| 13 | 1341016198 |
| 14 | 5237625812 |
| 15 | 17405443410 |
| 16 | 64898151922 |
| 17 | 250040973048 |
| 18 | 867290958802 |
| 19 | 3166736891794 |
| 20 | 12011520072686 |
| 21 | 42745544469774 |