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 | 3 |
| 2 | 41 |
| 3 | 43 |
| 4 | 641 |
| 5 | 643 |
| 6 | 8641 |
| 7 | 108643 |
| 8 | 18161412108641 |
| 9 | 525048464442403836343230282624222018161412108643 |
| 10 | 646260585654525048464442403836343230282624222018161412108641 |