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) |
|---|---|
| 4 | 2308 |
| 5 | 10830 |
| 6 | 119485 |
| 7 | 1325165 |
| 8 | 14696300 |
| 9 | 100729939 |
| 10 | 1117112142 |
| 11 | 12388963501 |
| 12 | 137395710653 |
| 13 | 1523741780684 |
| 14 | 10443881535043 |
| 15 | 115824421096014 |
| 16 | 1284512513591197 |
| 17 | 14245462070599181 |
| 18 | 157984595290182188 |
| 19 | 1082842525215598387 |
| 20 | 12008907626959811406 |
| 21 | 133180826421773523853 |