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 | 15 |
| 2 | 225 |
| 3 | 3375 |
| 4 | 39330 |
| 5 | 451278 |
| 6 | 4705642 |
| 7 | 47293550 |
| 8 | 453985015 |
| 9 | 4225323881 |
| 10 | 38217977443 |
| 11 | 337785304853 |
| 12 | 2925589051944 |
| 13 | 24901832826668 |
| 14 | 208741721350212 |
| 15 | 1726400790939232 |
| 16 | 14108352548185285 |
| 17 | 114068503433280219 |