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 | 2 |
| 3 | 9 |
| 4 | 225 |
| 5 | 315 |
| 6 | 1155 |
| 7 | 2835 |
| 8 | 4725 |
| 9 | 10395 |
| 10 | 11025 |
| 11 | 17325 |
| 12 | 45045 |
| 13 | 70875 |
| 14 | 93555 |
| 15 | 99225 |
| 16 | 155925 |
| 17 | 165375 |
| 18 | 255255 |
| 19 | 259875 |
| 20 | 363825 |
| 21 | 405405 |
| 22 | 637875 |
| 23 | 675675 |
| 24 | 1063125 |
| 25 | 1334025 |
| 26 | 1488375 |
| 27 | 1576575 |
| 28 | 2297295 |
| 29 | 2338875 |
| 30 | 2480625 |
| 31 | 3274425 |
| 32 | 3472875 |
| 33 | 3648645 |
| 34 | 3828825 |
| 35 | 5457375 |
| 36 | 6081075 |
| 37 | 10135125 |
| 38 | 12006225 |
| 39 | 12733875 |
| 40 | 13395375 |