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 | 45 |
| 3 | 225 |
| 4 | 585 |
| 5 | 2415 |
| 6 | 4725 |
| 7 | 9945 |
| 8 | 10395 |
| 9 | 31185 |
| 10 | 28665 |
| 11 | 45045 |
| 12 | 58905 |
| 13 | 143325 |
| 14 | 257985 |
| 15 | 135135 |
| 16 | 225225 |
| 17 | 329175 |
| 18 | 487305 |
| 19 | 405405 |
| 20 | 831285 |
| 21 | 1091475 |
| 22 | 675675 |
| 23 | 1396395 |
| 24 | 1576575 |
| 25 | 2927925 |
| 26 | 3132675 |
| 27 | 2436525 |
| 28 | 2027025 |
| 29 | 2567565 |
| 30 | 2297295 |
| 31 | 6235515 |
| 32 | 5360355 |
| 33 | 4729725 |
| 34 | 3828825 |
| 35 | 10503675 |