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 | 2 |
| 1 | 131 |
| 2 | 8161 |
| 3 | 386093 |
| 4 | 16290047 |
| 5 | 645155197 |
| 6 | 24563311309 |
| 7 | 910399916939 |
| 8 | 33089240375501 |
| 9 | 1184895616861903 |
| 10 | 41935796950796653 |
| 11 | 1470194760556507397 |
| 12 | 51140670371058101123 |
| 13 | 1767268299972575740723 |
| 14 | 60730194035557507211347 |
| 15 | 2076859014052740233944627 |