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 | 2 |
| 3 | 3 |
| 4 | 4 |
| 5 | 5 |
| 6 | 6 |
| 7 | 7 |
| 8 | 8 |
| 9 | 9 |
| 10 | 1547 |
| 11 | 26027 |
| 12 | 26933 |
| 13 | 45018 |
| 14 | 69781 |
| 15 | 80487 |
| 16 | 154791 |
| 17 | 23203827 |
| 18 | 257059332 |
| 19 | 278945612 |
| 20 | 456790123 |
| 21 | 469135802 |
| 22 | 493827160 |
| 23 | 494376160 |
| 24 | 506172839 |
| 25 | 530864197 |
| 26 | 543209876 |
| 27 | 897163795 |
| 28 | 1662971175 |
| 29 | 2293668391 |
| 30 | 3880266075 |
| 31 | 6473710191 |