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 | 2 |
| 2 | 67 |
| 3 | 223 |
| 4 | 2789 |
| 5 | 701 |
| 6 | 2423 |
| 7 | 243367 |
| 8 | 10513 |
| 9 | 10909 |
| 10 | 2114429 |
| 11 | 68543 |
| 12 | 181141 |
| 13 | 6139219 |
| 14 | 114493 |
| 15 | 356479 |
| 16 | 399946711 |
| 17 | 22549349 |
| 18 | 8371249 |
| 19 | 660040873 |
| 20 | 12088631 |
| 21 | 3352003 |