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 | 7 |
| 1 | 99 |
| 2 | 1393 |
| 3 | 19601 |
| 4 | 275807 |
| 5 | 3880899 |
| 6 | 54608393 |
| 7 | 768398401 |
| 8 | 10812186007 |
| 9 | 152139002499 |
| 10 | 2140758220993 |
| 11 | 30122754096401 |
| 12 | 423859315570607 |
| 13 | 5964153172084899 |
| 14 | 83922003724759193 |
| 15 | 1180872205318713601 |
| 16 | 16616132878186749607 |
| 17 | 233806732499933208099 |
| 18 | 3289910387877251662993 |