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 | 645 |
| 2 | 1905 |
| 3 | 18705 |
| 4 | 55245 |
| 5 | 62745 |
| 6 | 72885 |
| 7 | 215265 |
| 8 | 451905 |
| 9 | 831405 |
| 10 | 1246785 |
| 11 | 1472505 |
| 12 | 1489665 |
| 13 | 1608465 |
| 14 | 1815465 |
| 15 | 2077545 |
| 16 | 2113665 |
| 17 | 2882265 |
| 18 | 4535805 |
| 19 | 6135585 |
| 20 | 6242685 |
| 21 | 8322945 |
| 22 | 9063105 |
| 23 | 9816465 |
| 24 | 16263105 |
| 25 | 18137505 |
| 26 | 19523505 |
| 27 | 53661945 |
| 28 | 63560685 |
| 29 | 81612105 |
| 30 | 81722145 |