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 | 7 |
| 3 | 73 |
| 4 | 373 |
| 5 | 1404 |
| 6 | 4506 |
| 7 | 13226 |
| 8 | 36889 |
| 9 | 99947 |
| 10 | 266455 |
| 11 | 704150 |
| 12 | 1852212 |
| 13 | 4860468 |
| 14 | 12739243 |
| 15 | 33369709 |
| 16 | 87385081 |
| 17 | 228803856 |
| 18 | 599048334 |
| 19 | 1568366942 |
| 20 | 4106082685 |
| 21 | 10749916175 |
| 22 | 28143706267 |
| 23 | 73681248938 |
| 24 | 192900093288 |
| 25 | 505019090664 |
| 26 | 1322157246031 |
| 27 | 3461452722961 |