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 | 577 |
| 2 | 17981 |
| 3 | 182349 |
| 4 | 1042167 |
| 5 | 4211559 |
| 6 | 13497523 |
| 7 | 36644243 |
| 8 | 87831605 |
| 9 | 191065045 |
| 10 | 384593857 |
| 11 | 726495089 |
| 12 | 1301560155 |
| 13 | 2229621291 |
| 14 | 3675454983 |
| 15 | 5860399495 |
| 16 | 9075823625 |
| 17 | 13698583817 |
| 18 | 20208606757 |
| 19 | 29208734581 |
| 20 | 41446969823 |
| 21 | 57841257231 |