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 | 3 |
| 2 | 22 |
| 3 | 322 |
| 4 | 12958 |
| 5 | 2179956 |
| 6 | 1976588468 |
| 7 | 10811999412826 |
| 8 | 378274896023686216 |
| 9 | 88035611475274172311886 |
| 10 | 140618374201747733896872001960 |