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 | 0 |
| 1 | 3 |
| 2 | 51 |
| 3 | 657 |
| 4 | 7599 |
| 5 | 83193 |
| 6 | 882351 |
| 7 | 9176457 |
| 8 | 94235199 |
| 9 | 959646393 |
| 10 | 9717524751 |
| 11 | 98022673257 |
| 12 | 986158712799 |
| 13 | 9903110989593 |
| 14 | 99321776927151 |
| 15 | 995252438490057 |
| 16 | 9966767069430399 |
| 17 | 99767369486012793 |
| 18 | 998371586402089551 |
| 19 | 9988601104814626857 |