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 | 12 |
| 3 | 153 |
| 4 | 2024 |
| 5 | 27405 |
| 6 | 376992 |
| 7 | 5245786 |
| 8 | 73629072 |
| 9 | 1040465790 |
| 10 | 14783142660 |
| 11 | 210980549208 |
| 12 | 3022285436352 |
| 13 | 43430966148115 |
| 14 | 625806790696080 |
| 15 | 9038619861406740 |
| 16 | 130815226545884704 |
| 17 | 1896724514424115530 |