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 | 209 |
| 3 | 1121 |
| 4 | 2989 |
| 5 | 11381 |
| 6 | 34889 |
| 7 | 47701 |
| 8 | 62453 |
| 9 | 188785 |
| 10 | 878185 |
| 11 | 1761737 |
| 12 | 3931385 |
| 13 | 5630905 |
| 14 | 7990481 |
| 15 | 32892077 |
| 16 | 204570037 |
| 17 | 253223785 |
| 18 | 1353794333 |
| 19 | 2877954833 |