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) |
|---|---|
| 0 | 1 |
| 1 | 9 |
| 2 | 36 |
| 3 | 84 |
| 4 | 135 |
| 5 | 198 |
| 6 | 336 |
| 7 | 540 |
| 8 | 675 |
| 9 | 766 |
| 10 | 1080 |
| 11 | 1584 |
| 12 | 1857 |
| 13 | 1962 |
| 14 | 2520 |
| 15 | 3480 |
| 16 | 3987 |
| 17 | 3987 |
| 18 | 4656 |
| 19 | 6300 |
| 20 | 7326 |
| 21 | 7182 |
| 22 | 8064 |
| 23 | 10656 |
| 24 | 12063 |
| 25 | 11583 |
| 26 | 12672 |
| 27 | 16116 |
| 28 | 18180 |
| 29 | 17784 |
| 30 | 19104 |
| 31 | 23940 |
| 32 | 27027 |
| 33 | 25554 |