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 | 45 |
| 2 | 2025 |
| 3 | 91125 |
| 4 | 4100625 |
| 5 | 184528125 |
| 6 | 8303765625 |
| 7 | 373669453125 |
| 8 | 16815125390625 |
| 9 | 756680642578125 |
| 10 | 34050628916015625 |
| 11 | 1532278301220703125 |
| 12 | 68952523554931640625 |
| 13 | 3102863559971923828125 |
| 14 | 139628860198736572265625 |
| 15 | 6283298708943145751953125 |
| 16 | 282748441902441558837890625 |