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 | 24 |
| 2 | 201 |
| 3 | 1601 |
| 4 | 15460 |
| 5 | 133118 |
| 6 | 1190848 |
| 7 | 10614316 |
| 8 | 94161619 |
| 9 | 838433062 |
| 10 | 7454215075 |
| 11 | 66292530149 |
| 12 | 589611150641 |
| 13 | 5243462854609 |
| 14 | 46633173607625 |
| 15 | 414729611119231 |
| 16 | 3688374141775373 |
| 17 | 32802445652275246 |
| 18 | 291727015058062232 |
| 19 | 2594462295371896780 |
| 20 | 23073742634349717259 |