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 | 1 |
| 2 | 14 |
| 3 | 411 |
| 4 | 21208 |
| 5 | 1703145 |
| 6 | 195285456 |
| 7 | 30113813863 |
| 8 | 5985071842688 |
| 9 | 1485696848042385 |
| 10 | 449588756524844800 |
| 11 | 162668114715527356551 |
| 12 | 69259775641873646754816 |
| 13 | 34243366782512243213286169 |
| 14 | 19439795735713938153732810752 |
| 15 | 12549399357405863545478828022375 |