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 | 121 |
| 2 | 1089 |
| 3 | 9801 |
| 4 | 88209 |
| 5 | 793881 |
| 6 | 7144929 |
| 7 | 64304361 |
| 8 | 578739249 |
| 9 | 5208653241 |
| 10 | 46877879169 |
| 11 | 421900912521 |
| 12 | 3797108212689 |
| 13 | 34173973914201 |
| 14 | 307565765227809 |
| 15 | 2768091887050281 |
| 16 | 24912826983452529 |
| 17 | 224215442851072761 |
| 18 | 2017938985659654849 |
| 19 | 18161450870936893641 |