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 | 4 |
| 4 | 4 |
| 5 | 29 |
| 6 | 17 |
| 7 | 436 |
| 8 | 356 |
| 9 | 569 |
| 10 | 1847 |
| 11 | 27704 |
| 12 | 72944 |
| 13 | 1283333 |
| 14 | 726079 |
| 15 | 23833532 |
| 16 | 45232276 |
| 17 | 302068799 |
| 18 | 616565857 |
| 19 | 26369361188 |
| 20 | 23157514888 |
| 21 | 70991664061 |
| 22 | 505527042479 |
| 23 | 1150735735948 |
| 24 | 13238389944712 |
| 25 | 58668785675111 |
| 26 | 209280259070287 |
| 27 | 7809609503808088 |
| 28 | 530566746979816 |