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 | 5 |
| 2 | 60 |
| 3 | 935 |
| 4 | 16555 |
| 5 | 316251 |
| 6 | 6353760 |
| 7 | 132321990 |
| 8 | 2830853610 |
| 9 | 61841702065 |
| 10 | 1373736123760 |
| 11 | 30935736733230 |
| 12 | 704631080073635 |
| 13 | 16204866668942000 |
| 14 | 375762274309378440 |
| 15 | 8775795659568727020 |
| 16 | 206241872189050376550 |
| 17 | 4873761343609509542490 |