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 | 27 |
| 2 | 21952 |
| 3 | 2628072 |
| 4 | 202262003 |
| 5 | 229220928 |
| 6 | 22521332224 |
| 7 | 21148222722264 |
| 8 | 25942222239227 |
| 9 | 2272271222935232 |
| 10 | 2262268226562252992 |
| 11 | 4223937222222326272 |
| 12 | 22225347273222227224 |
| 13 | 122245292222422449622424 |
| 14 | 2732072222242422541222208 |
| 15 | 22422524292920620222272827 |