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 | 2 |
| 3 | 11 |
| 4 | 37 |
| 5 | 59 |
| 6 | 1609 |
| 7 | 2333 |
| 8 | 10831 |
| 9 | 46381 |
| 10 | 1428571429 |
| 11 | 17956553 |
| 12 | 5271373 |
| 13 | 872838923897 |
| 14 | 165850848142657 |
| 15 | 399174011286107 |
| 16 | 67280421310721 |
| 17 | 19238145625263645679 |
| 18 | 2083719670141 |
| 19 | 29528651577019605807821 |