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) |
|---|---|
| 6 | 17 |
| 7 | 229 |
| 8 | 1819 |
| 9 | 11172 |
| 10 | 58847 |
| 11 | 280158 |
| 12 | 1242859 |
| 13 | 5238042 |
| 14 | 21245548 |
| 15 | 83685745 |
| 16 | 322225735 |
| 17 | 1218705577 |
| 18 | 4544214608 |
| 19 | 16751906196 |
| 20 | 61188410692 |
| 21 | 221832968059 |
| 22 | 799344529621 |
| 23 | 2865983103387 |
| 24 | 10233713828145 |
| 25 | 36419029944617 |
| 26 | 129245774064864 |
| 27 | 457623216922119 |