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 | 0 |
| 1 | 1 |
| 2 | 25 |
| 3 | 637 |
| 4 | 16810 |
| 5 | 450241 |
| 6 | 12123475 |
| 7 | 327035437 |
| 8 | 8827268020 |
| 9 | 238312027681 |
| 10 | 6434206838125 |
| 11 | 173721623357437 |
| 12 | 4690466178937630 |
| 13 | 126642427965100321 |
| 14 | 3419344125259375975 |
| 15 | 92322278513810982637 |
| 16 | 2492701404059145489640 |
| 17 | 67302936867273104276161 |