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 | 13 |
| 2 | 541 |
| 3 | 47293 |
| 4 | 7087261 |
| 5 | 1622632573 |
| 6 | 526858348381 |
| 7 | 230283190977853 |
| 8 | 130370767029135901 |
| 9 | 92801587319328411133 |
| 10 | 81124824998504073881821 |
| 11 | 85438451336745709294580413 |
| 12 | 106697365438475775825583498141 |
| 13 | 155897763918621623249276226253693 |
| 14 | 263478385263023690020893329044576861 |