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 | 1 |
| 2 | 1224 |
| 3 | 126191 |
| 4 | 428519 |
| 5 | 649727 |
| 6 | 1015416 |
| 7 | 1988064 |
| 8 | 3425856 |
| 9 | 4542740 |
| 10 | 4574240 |
| 11 | 4743900 |
| 12 | 4813668 |
| 13 | 5131008 |
| 14 | 6899840 |
| 15 | 7001315 |
| 16 | 7172424 |
| 17 | 7356096 |
| 18 | 8020583 |
| 19 | 10206000 |
| 20 | 11146421 |
| 21 | 11566800 |
| 22 | 11597999 |
| 23 | 11693807 |
| 24 | 12556700 |
| 25 | 13742624 |
| 26 | 13745759 |
| 27 | 13831487 |
| 28 | 14365120 |
| 29 | 16939799 |
| 30 | 20561400 |