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 | 6 |
| 3 | 28 |
| 4 | 120 |
| 5 | 270 |
| 6 | 496 |
| 7 | 672 |
| 8 | 1080 |
| 9 | 1638 |
| 10 | 1782 |
| 11 | 3780 |
| 12 | 8128 |
| 13 | 18600 |
| 14 | 20580 |
| 15 | 24948 |
| 16 | 26208 |
| 17 | 30240 |
| 18 | 32640 |
| 19 | 32760 |
| 20 | 35640 |
| 21 | 41850 |
| 22 | 44226 |
| 23 | 55860 |
| 24 | 66960 |
| 25 | 164640 |
| 26 | 167400 |
| 27 | 185220 |
| 28 | 199584 |
| 29 | 273000 |
| 30 | 293760 |
| 31 | 401310 |
| 32 | 441936 |
| 33 | 446880 |
| 34 | 502740 |
| 35 | 523776 |
| 36 | 614250 |
| 37 | 707616 |
| 38 | 802620 |
| 39 | 819000 |