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 | 2 |
| 2 | 41 |
| 3 | 1181 |
| 4 | 61681 |
| 5 | 9161 |
| 6 | 6781 |
| 7 | 4021 |
| 8 | 1321 |
| 9 | 42521761 |
| 10 | 27961 |
| 11 | 212601841 |
| 12 | 85403261 |
| 13 | 641 |
| 14 | 1383881 |
| 15 | 131381 |
| 16 | 4278255361 |
| 17 | 63541 |
| 18 | 145501 |
| 19 | 16936647121 |
| 20 | 222361 |
| 21 | 920421641 |
| 22 | 150901 |
| 23 | 272341 |
| 24 | 1801385941 |
| 25 | 632133361 |
| 26 | 208518605101 |
| 27 | 47763361 |
| 28 | 84961 |
| 29 | 470925821 |
| 30 | 12109381 |