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 | 2 |
| 1 | 30 |
| 2 | 3522 |
| 3 | 1066590 |
| 4 | 604935042 |
| 5 | 551609685150 |
| 6 | 737740947722562 |
| 7 | 1360427147514751710 |
| 8 | 3308161927353377294082 |
| 9 | 10256718523496425979562270 |
| 10 | 39490468691102039103925777602 |
| 11 | 184856411587530526077816051412830 |
| 12 | 1033888847501229495999134528615701122 |