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) |
|---|---|
| 0 | 1 |
| 1 | 5625 |
| 2 | 164025 |
| 3 | 1399489 |
| 4 | 6765201 |
| 5 | 23532201 |
| 6 | 66015625 |
| 7 | 159138225 |
| 8 | 342731169 |
| 9 | 676572121 |
| 10 | 1246160601 |
| 11 | 2169230625 |
| 12 | 3603000625 |
| 13 | 5752160649 |
| 14 | 8877596841 |
| 15 | 13305853201 |
| 16 | 19439330625 |
| 17 | 27767223225 |
| 18 | 38877191929 |
| 19 | 53467775361 |