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 | 30 |
| 2 | 525 |
| 3 | 6850 |
| 4 | 73500 |
| 5 | 682656 |
| 6 | 5663205 |
| 7 | 42852150 |
| 8 | 300202485 |
| 9 | 1968839760 |
| 10 | 12192045213 |
| 11 | 71771729100 |
| 12 | 403849667345 |
| 13 | 2181900748410 |
| 14 | 11361561151605 |
| 15 | 57202802787016 |
| 16 | 279230335572240 |
| 17 | 1324656422161470 |