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 | 33 |
| 2 | 1089 |
| 3 | 20129 |
| 4 | 339927 |
| 5 | 5163989 |
| 6 | 75643222 |
| 7 | 1076278662 |
| 8 | 15104206828 |
| 9 | 209938880964 |
| 10 | 2902462402332 |
| 11 | 39984970277418 |
| 12 | 549661931523107 |
| 13 | 7545440863028881 |
| 14 | 103487881710317937 |
| 15 | 1418545619416264861 |