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 | 3 |
| 2 | 8 |
| 3 | 12 |
| 4 | 144 |
| 5 | 1020 |
| 6 | 8040 |
| 7 | 13860 |
| 8 | 34840 |
| 9 | 729180 |
| 10 | 1728240 |
| 11 | 3232060 |
| 12 | 17576520 |
| 13 | 39279240 |
| 14 | 85184880 |
| 15 | 117649980 |
| 16 | 778689840 |
| 17 | 884737920 |
| 18 | 1225045140 |
| 19 | 1771563420 |
| 20 | 3723878100 |
| 21 | 3869896140 |
| 22 | 4574299320 |
| 23 | 7762395960 |
| 24 | 12487172640 |
| 25 | 14348911860 |
| 26 | 14886940920 |
| 27 | 21484957560 |
| 28 | 24137574780 |