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 | 1 |
| 2 | 2 |
| 3 | 17 |
| 4 | 34 |
| 5 | 4097 |
| 6 | 386 |
| 7 | 1679617 |
| 8 | 263170 |
| 9 | 60470273 |
| 10 | 20971522 |
| 11 | 1000000000001 |
| 12 | 67223554 |
| 13 | 1283918464548865 |
| 14 | 3291294892034 |
| 15 | 281543697235969 |
| 16 | 2251868534210562 |
| 17 | 4722366482869645213697 |
| 18 | 4265518198947842 |
| 19 | 12748236216396078174437377 |
| 20 | 9223671104051085314 |
| 21 | 552066177293775007645697 |
| 22 | 1100000000000000000000002 |