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 | 4 |
| 1 | 14 |
| 2 | 194 |
| 3 | 37634 |
| 4 | 342576132 |
| 5 | 250734296 |
| 6 | 433300702 |
| 7 | 16341479 |
| 8 | 49808751 |
| 9 | 57936161 |
| 10 | 211467447 |
| 11 | 71320725 |
| 12 | 91230447 |
| 13 | 153832672 |
| 14 | 217471443 |
| 15 | 239636427 |
| 16 | 223645010 |
| 17 | 90243197 |
| 18 | 27374393 |
| 19 | 490737401 |
| 20 | 35441039 |
| 21 | 303927542 |
| 22 | 202574536 |