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 | 441 |
| 3 | 4389 |
| 4 | 39501 |
| 5 | 53361 |
| 6 | 92169 |
| 7 | 829521 |
| 8 | 1935549 |
| 9 | 302841 |
| 10 | 2725569 |
| 11 | 3041577 |
| 12 | 27374193 |
| 13 | 853577109 |
| 14 | 7682193981 |
| 15 | 3129357 |
| 16 | 6359661 |
| 17 | 19263321 |
| 18 | 234201429 |
| 19 | 230639102001 |
| 20 | 437200389130923862144165773 |
| 21 | 1341335457 |
| 22 | 12072019113 |
| 23 | 23318757 |
| 24 | 1201975929 |
| 25 | 28164213 |
| 26 | 253477917 |
| 27 | 4918230009 |
| 28 | 101711843982441 |