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 | 0 |
| 2 | 1 |
| 3 | 17 |
| 4 | 97 |
| 5 | 1676 |
| 6 | 21241 |
| 7 | 214259 |
| 8 | 5020449 |
| 9 | 34808102 |
| 10 | 7233300201 |
| 11 | 46070142226 |
| 12 | 7806783217105 |
| 13 | 165239209697109 |
| 14 | 1608006723911113 |
| 15 | 48560388990668468 |
| 16 | 4867006141797699265 |
| 17 | 530779430908845468654 |
| 18 | 18442832496573633213385 |