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 | 17 |
| 2 | 13 |
| 3 | 205 |
| 4 | 5881 |
| 5 | 4141 |
| 6 | 28121 |
| 7 | 290153 |
| 8 | 863917 |
| 9 | 3434089 |
| 10 | 4073856925 |
| 11 | 4415269417 |
| 12 | 38699450921 |
| 13 | 728179827481 |
| 14 | 3622896647245 |
| 15 | 3799767363925 |
| 16 | 103501463840737 |
| 17 | 3540212449926365 |
| 18 | 68963670206614825 |