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) |
|---|---|
| 0 | 1 |
| 1 | 60 |
| 2 | 490 |
| 3 | 2220 |
| 4 | 7315 |
| 5 | 19656 |
| 6 | 45780 |
| 7 | 95880 |
| 8 | 184965 |
| 9 | 334180 |
| 10 | 572286 |
| 11 | 937300 |
| 12 | 1478295 |
| 13 | 2257360 |
| 14 | 3351720 |
| 15 | 4856016 |
| 16 | 6884745 |
| 17 | 9574860 |
| 18 | 13088530 |
| 19 | 17616060 |
| 20 | 23378971 |
| 21 | 30633240 |
| 22 | 39672700 |
| 23 | 50832600 |
| 24 | 64493325 |
| 25 | 81084276 |
| 26 | 101087910 |