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 | 181 |
| 3 | 9019 |
| 4 | 331489 |
| 5 | 10669771 |
| 6 | 320396041 |
| 7 | 9245913139 |
| 8 | 260489615329 |
| 9 | 7229878904251 |
| 10 | 198760197641401 |
| 11 | 5430623746397059 |
| 12 | 147781972534146769 |
| 13 | 4010919223287633931 |
| 14 | 108669462396348197161 |
| 15 | 2940820425317878781779 |