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 | 0 |
| 2 | 1 |
| 3 | 72 |
| 4 | 7031 |
| 5 | 688942 |
| 6 | 67509261 |
| 7 | 6615218612 |
| 8 | 648223914691 |
| 9 | 63519328421082 |
| 10 | 6224245961351321 |
| 11 | 609912584884008352 |
| 12 | 59765209072671467151 |
| 13 | 5856380576536919772422 |
| 14 | 573865531291545466230181 |
| 15 | 56232965685994918770785292 |
| 16 | 5510256771696210494070728411 |
| 17 | 539948930660542633500160598962 |