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 | 1 |
| 2 | 1331 |
| 3 | 3375 |
| 4 | 35937 |
| 5 | 59319 |
| 6 | 357911 |
| 7 | 753571 |
| 8 | 5177717 |
| 9 | 5359375 |
| 10 | 5735339 |
| 11 | 9393931 |
| 12 | 17373979 |
| 13 | 37595375 |
| 14 | 37159393753 |
| 15 | 99317171591 |
| 16 | 175333911173 |
| 17 | 397551775977 |
| 18 | 1913551573375 |
| 19 | 9735913353977 |
| 20 | 11997979755957 |
| 21 | 17171515157399 |
| 22 | 335571975137771 |
| 23 | 1331399339931331 |