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 | 6 |
| 2 | 20 |
| 3 | 30 |
| 4 | 306 |
| 5 | 1722 |
| 6 | 2862 |
| 7 | 11772 |
| 8 | 13572 |
| 9 | 28730 |
| 10 | 29756 |
| 11 | 40602 |
| 12 | 54056 |
| 13 | 219492 |
| 14 | 351056 |
| 15 | 463080 |
| 16 | 947702 |
| 17 | 1391220 |
| 18 | 1546292 |
| 19 | 2043470 |
| 20 | 7174362 |
| 21 | 7703400 |
| 22 | 11400752 |
| 23 | 15104882 |
| 24 | 19127502 |
| 25 | 20155610 |
| 26 | 113667582 |
| 27 | 172173762 |
| 28 | 314299712 |
| 29 | 475654290 |
| 30 | 555238532 |
| 31 | 558447792 |
| 32 | 562519806 |