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) |
|---|---|
| 0 | 1 |
| 1 | 9 |
| 2 | 171 |
| 3 | 4149 |
| 4 | 113931 |
| 5 | 3371589 |
| 6 | 104901291 |
| 7 | 3382995429 |
| 8 | 112077370251 |
| 9 | 3791733009669 |
| 10 | 130449626216811 |
| 11 | 4549980276438309 |
| 12 | 160525597608496971 |
| 13 | 5718506593711745349 |
| 14 | 205410965909348626731 |
| 15 | 7431671761342761234789 |