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 | 40 |
| 2 | 1600 |
| 3 | 20550 |
| 4 | 327075 |
| 5 | 5959350 |
| 6 | 113534330 |
| 7 | 2215586241 |
| 8 | 43590708750 |
| 9 | 861389821740 |
| 10 | 17048067532895 |
| 11 | 337683209581900 |
| 12 | 6690732833251660 |
| 13 | 132588872475506025 |
| 14 | 2627640756847273700 |
| 15 | 52076089665529539750 |