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 | 4181 |
| 2 | 1346269 |
| 3 | 165580141 |
| 4 | 53316291173 |
| 5 | 956722026041 |
| 6 | 2504730781961 |
| 7 | 308061521170129 |
| 8 | 806515533049393 |
| 9 | 14472334024676221 |
| 10 | 1779979416004714189 |
| 11 | 573147844013817084101 |
| 12 | 10284720757613717413913 |
| 13 | 26925748508234281076009 |