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 | 195 |
| 2 | 1599 |
| 3 | 2379 |
| 4 | 19695 |
| 5 | 163059 |
| 6 | 242619 |
| 7 | 2008695 |
| 8 | 16630419 |
| 9 | 24744759 |
| 10 | 204867195 |
| 11 | 1696139679 |
| 12 | 2523722799 |
| 13 | 20894445195 |
| 14 | 172989616839 |
| 15 | 257394980739 |
| 16 | 2131028542695 |
| 17 | 17643244777899 |
| 18 | 26251764312579 |
| 19 | 217344016909695 |
| 20 | 1799437977728859 |
| 21 | 2677422564902319 |