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 | 2 |
| 3 | 4 |
| 4 | 10 |
| 5 | 26 |
| 6 | 85 |
| 7 | 302 |
| 8 | 1285 |
| 9 | 6170 |
| 10 | 34294 |
| 11 | 227417 |
| 12 | 2001617 |
| 13 | 26098641 |
| 14 | 520051389 |
| 15 | 15041205304 |