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 | 2 |
| 2 | 16 |
| 3 | 160 |
| 4 | 1591 |
| 5 | 15905 |
| 6 | 159041 |
| 7 | 1590405 |
| 8 | 15904042 |
| 9 | 159040419 |
| 10 | 1590404183 |
| 11 | 15904041824 |
| 12 | 159040418240 |
| 13 | 1590404182399 |
| 14 | 15904041823989 |
| 15 | 159040418239888 |
| 16 | 1590404182398875 |
| 17 | 15904041823988748 |
| 18 | 159040418239887480 |
| 19 | 1590404182398874791 |
| 20 | 15904041823988747910 |
| 21 | 159040418239887479099 |