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 | 6 |
| 2 | 41 |
| 3 | 336 |
| 4 | 2942 |
| 5 | 24520 |
| 6 | 183010 |
| 7 | 1202234 |
| 8 | 6979061 |
| 9 | 36211867 |
| 10 | 170079565 |
| 11 | 731624096 |
| 12 | 2911895183 |
| 13 | 10815978253 |
| 14 | 37768115174 |
| 15 | 124748330554 |
| 16 | 391810133592 |
| 17 | 1175449312215 |
| 18 | 3381493985527 |
| 19 | 9359644588182 |
| 20 | 25000202714062 |
| 21 | 64609485660764 |