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 | 3 |
| 2 | 49 |
| 3 | 1681 |
| 4 | 18490 |
| 5 | 23762 |
| 6 | 656914 |
| 7 | 843637 |
| 8 | 5606230 |
| 9 | 35558770 |
| 10 | 46297822 |
| 11 | 59006794 |
| 12 | 114594493 |
| 13 | 132859642 |
| 14 | 138852445 |
| 15 | 157906534 |
| 16 | 289405462 |
| 17 | 299441785 |
| 18 | 536671282 |
| 19 | 813736930 |
| 20 | 1175272581 |
| 21 | 1276553470 |
| 22 | 1655870629 |
| 23 | 5086602202 |
| 24 | 5429407657 |
| 25 | 6549516022 |
| 26 | 8645559934 |
| 27 | 10373399185 |