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 | 8 |
| 2 | 92 |
| 3 | 1080 |
| 4 | 12070 |
| 5 | 132408 |
| 6 | 1425372 |
| 7 | 15114504 |
| 8 | 158210353 |
| 9 | 1637612160 |
| 10 | 16784647360 |
| 11 | 170537275776 |
| 12 | 1719204122528 |
| 13 | 17209440777600 |
| 14 | 171165585295552 |
| 15 | 1692447401221248 |
| 16 | 16644429470981928 |
| 17 | 162875924564677824 |
| 18 | 1586486181338263456 |
| 19 | 15386713233832145728 |