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 | 20 |
| 2 | 1980 |
| 3 | 194040 |
| 4 | 19013960 |
| 5 | 1863174060 |
| 6 | 182572043940 |
| 7 | 17890197132080 |
| 8 | 1753056746899920 |
| 9 | 171781670999060100 |
| 10 | 16832850701160989900 |
| 11 | 1649447587042777950120 |
| 12 | 161629030679491078121880 |
| 13 | 15837995559003082877994140 |
| 14 | 1551961935751622630965303860 |