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 | 13 |
| 2 | 155 |
| 3 | 1847 |
| 4 | 22009 |
| 5 | 262261 |
| 6 | 3125123 |
| 7 | 37239215 |
| 8 | 443745457 |
| 9 | 5287706269 |
| 10 | 63008729771 |
| 11 | 750817050983 |
| 12 | 8946795882025 |
| 13 | 106610733533317 |
| 14 | 1270382006517779 |
| 15 | 15137973344680031 |
| 16 | 180385298129642593 |