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) |
|---|---|
| 0 | 3 |
| 1 | 29 |
| 2 | 569 |
| 3 | 7949 |
| 4 | 104759 |
| 5 | 1299917 |
| 6 | 15486257 |
| 7 | 179424797 |
| 8 | 2038074947 |
| 9 | 22801763729 |
| 10 | 252097801757 |
| 11 | 2760727302647 |
| 12 | 29996224276019 |
| 13 | 323780508946379 |
| 14 | 3475385758524917 |
| 15 | 37124508045066647 |
| 16 | 394906913903736539 |
| 17 | 4185296581467696419 |
| 18 | 44211790234832169821 |
| 19 | 465675465116607069659 |