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 | 69 |
| 2 | 1410 |
| 3 | 21921 |
| 4 | 298725 |
| 5 | 3792660 |
| 6 | 46016727 |
| 7 | 541129686 |
| 8 | 6221175405 |
| 9 | 70311424443 |
| 10 | 784112741880 |
| 11 | 8651123311875 |
| 12 | 94611219470547 |