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 | 5 |
| 2 | 212 |
| 3 | 212 |
| 4 | 555 |
| 5 | 78287 |
| 6 | 936639 |
| 7 | 4347434 |
| 8 | 261565162 |
| 9 | 557191755 |
| 10 | 22113131122 |
| 11 | 35779797753 |
| 12 | 2583864683852 |
| 13 | 5269108019625 |
| 14 | 186632555236681 |
| 15 | 671032363230176 |
| 16 | 25566825552866552 |
| 17 | 63506697679660536 |
| 18 | 1599153538353519951 |
| 19 | 1599153538353519951 |