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 | 15 |
| 1 | 600 |
| 2 | 39000 |
| 3 | 3510000 |
| 4 | 403650000 |
| 5 | 56511000000 |
| 6 | 9324315000000 |
| 7 | 1771619850000000 |
| 8 | 380898267750000000 |
| 9 | 91415584260000000000 |
| 10 | 24225129828900000000000 |
| 11 | 7025287650381000000000000 |
| 12 | 2212965609870015000000000000 |
| 13 | 752408307355805100000000000000 |
| 14 | 274629032184868861500000000000000 |