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) |
|---|---|
| 1 | 3 |
| 2 | 30 |
| 3 | 265 |
| 4 | 2351 |
| 5 | 21062 |
| 6 | 191630 |
| 7 | 1766955 |
| 8 | 16465551 |
| 9 | 154749588 |
| 10 | 1464326721 |
| 11 | 13932672360 |
| 12 | 133165432342 |
| 13 | 1277568139729 |
| 14 | 12295904124627 |
| 15 | 118665023703067 |
| 16 | 1147922359531155 |