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 | 30 |
| 2 | 1017 |
| 3 | 1417992 |
| 4 | 1475602431690 |
| 5 | 887899295279284798114284 |
| 6 | 580352523353299355481324176693737926736684735143 |