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 | 0 |
| 2 | 1 |
| 3 | 30 |
| 4 | 31 |
| 5 | 756 |
| 6 | 3250 |
| 7 | 3276 |
| 8 | 3280 |
| 9 | 81255 |
| 10 | 81256 |
| 11 | 81280 |
| 12 | 81900 |
| 13 | 81901 |
| 14 | 82000 |
| 15 | 59078250 |
| 16 | 59078251 |
| 17 | 59078280 |
| 18 | 59078281 |
| 19 | 31789468750 |
| 20 | 31789468776 |
| 21 | 31789469505 |
| 22 | 31789469506 |
| 23 | 31789471900 |
| 24 | 31789471905 |
| 25 | 31789471906 |
| 26 | 31789472005 |
| 27 | 946095722031 |
| 28 | 946095800025 |
| 29 | 946095800026 |
| 30 | 946095800031 |
| 31 | 946095800130 |