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) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 26 |
| 3 | 76 |
| 4 | 776 |
| 5 | 3376 |
| 6 | 25376 |
| 7 | 131776 |
| 8 | 872576 |
| 9 | 4907776 |
| 10 | 30757376 |
| 11 | 179301376 |
| 12 | 1096779776 |
| 13 | 6496792576 |
| 14 | 39316299776 |
| 15 | 234555621376 |
| 16 | 1412702437376 |
| 17 | 8454739787776 |
| 18 | 50814338072576 |
| 19 | 304542431051776 |
| 20 | 1828628975845376 |