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 | 9 |
| 2 | 81 |
| 3 | 225 |
| 4 | 441 |
| 5 | 1089 |
| 6 | 13689 |
| 7 | 56169 |
| 8 | 74529 |
| 9 | 91809 |
| 10 | 95481 |
| 11 | 149769 |
| 12 | 184041 |
| 13 | 194481 |
| 14 | 199809 |
| 15 | 263169 |
| 16 | 314721 |
| 17 | 328329 |
| 18 | 370881 |
| 19 | 651249 |
| 20 | 804609 |
| 21 | 1071225 |
| 22 | 1147041 |
| 23 | 1238769 |
| 24 | 1306449 |
| 25 | 1520289 |
| 26 | 1535121 |
| 27 | 1718721 |
| 28 | 2442969 |
| 29 | 2595321 |
| 30 | 2614689 |