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 | 4 |
| 2 | 123 |
| 3 | 5233 |
| 4 | 161800 |
| 5 | 6155230 |
| 6 | 223026907 |
| 7 | 8061851335 |
| 8 | 295743829064 |
| 9 | 10750194262698 |
| 10 | 392127322268846 |
| 11 | 14301080443962397 |
| 12 | 521186161714401053 |
| 13 | 19005127884701974465 |
| 14 | 692863015545590519355 |
| 15 | 25260000472133325186613 |
| 16 | 920954865421382858310101 |