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 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 5 |
| 6 | 29 |
| 7 | 433 |
| 8 | 37666 |
| 9 | 48928105 |
| 10 | 5528778008357 |
| 11 | 811537892743746482789 |
| 12 | 13460438563050022083842073547074914 |
| 13 | 32770967840592833551621556305285371426044732591005957081 |