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 | 3 |
| 3 | 27 |
| 4 | 429 |
| 5 | 9609 |
| 6 | 277107 |
| 7 | 9772803 |
| 8 | 407452221 |
| 9 | 19604840481 |
| 10 | 1069202914083 |
| 11 | 65177482634667 |
| 12 | 4391636680582029 |
| 13 | 324102772814580729 |
| 14 | 25999541378465556627 |
| 15 | 2252597527900572815763 |
| 16 | 209625760563134613131421 |