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 | 1 |
| 1 | 6 |
| 2 | 47 |
| 3 | 223 |
| 4 | 1643 |
| 5 | 6187 |
| 6 | 173339 |
| 7 | 148591 |
| 8 | 44999149 |
| 9 | 409402223 |
| 10 | 1067091709 |
| 11 | 33428532191 |
| 12 | 1484643512329 |
| 13 | 5818648016477 |
| 14 | 866275665579983 |
| 15 | 2261064256234247 |
| 16 | 4585711907324687 |
| 17 | 1773637758861597199 |