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 | 2 |
| 2 | 52 |
| 3 | 881 |
| 4 | 12471 |
| 5 | 161436 |
| 6 | 1980642 |
| 7 | 23471475 |
| 8 | 271360653 |
| 9 | 3080075432 |
| 10 | 34465432859 |
| 11 | 381301109919 |
| 12 | 4179478903392 |
| 13 | 45459467009968 |
| 14 | 491241450001328 |
| 15 | 5278882299478796 |
| 16 | 56453500988940615 |
| 17 | 601181789833245631 |
| 18 | 6378285697775544230 |