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 | 15625 |
| 1 | 11390625 |
| 2 | 244140625 |
| 3 | 1838265625 |
| 4 | 8303765625 |
| 5 | 27680640625 |
| 6 | 75418890625 |
| 7 | 177978515625 |
| 8 | 377149515625 |
| 9 | 735091890625 |
| 10 | 1340095640625 |
| 11 | 2313060765625 |
| 12 | 3814697265625 |
| 13 | 6053445140625 |
| 14 | 9294114390625 |
| 15 | 13867245015625 |
| 16 | 20179187015625 |
| 17 | 28722900390625 |
| 18 | 40089475140625 |